{"id":6896,"date":"2021-12-28T08:10:00","date_gmt":"2021-12-28T08:10:00","guid":{"rendered":"https:\/\/stgwebsite.mindspark.in\/studymaterial\/?page_id=6896"},"modified":"2022-01-02T13:56:31","modified_gmt":"2022-01-02T13:56:31","slug":"cube-root-of-3375-different-methods","status":"publish","type":"page","link":"https:\/\/stgwebsite.mindspark.in\/studymaterial\/math-concepts\/cube-root-of-3375-different-methods\/","title":{"rendered":"Cube root of 3375 -Different methods"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;Section&#8221; module_class=&#8221;mainsec&#8221; _builder_version=&#8221;4.10.4&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#e0f2fd&#8221; z_index=&#8221;1&#8243; custom_padding=&#8221;5px||5px||true|false&#8221; locked=&#8221;off&#8221; collapsed=&#8221;off&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;3_5,2_5&#8243; custom_padding_last_edited=&#8221;on|phone&#8221; _builder_version=&#8221;4.10.8&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#FFFFFF&#8221; width=&#8221;100%&#8221; max_width=&#8221;1310px&#8221; custom_padding=&#8221;|51px|40px|51px|false|true&#8221; custom_padding_tablet=&#8221;&#8221; custom_padding_phone=&#8221;|40px|30px|40px|false|true&#8221; border_radii=&#8221;on|10px|10px|10px|10px&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;3_5&#8243; admin_label=&#8221;Column L&#8221; _builder_version=&#8221;4.9.10&#8243; _module_preset=&#8221;default&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_text admin_label=&#8221;Acute Angles<br \/>\n&#8221; _builder_version=&#8221;4.11.3&#8243; _module_preset=&#8221;default&#8221; header_font=&#8221;|700|||||||&#8221; header_text_align=&#8221;left&#8221; header_font_size=&#8221;50px&#8221; header_line_height=&#8221;1.18em&#8221; custom_padding=&#8221;|0px||4px|false|false&#8221; header_font_size_tablet=&#8221;&#8221; header_font_size_phone=&#8221;35px&#8221; header_font_size_last_edited=&#8221;on|phone&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h1>Cube root of 3375 -Different methods<\/h1>\n<p>[\/et_pb_text][et_pb_text admin_label=&#8221;Text&#8221; _builder_version=&#8221;4.13.1&#8243; _module_preset=&#8221;default&#8221; text_font_size=&#8221;16px&#8221; header_2_font=&#8221;|600|||||||&#8221; header_2_text_color=&#8221;#a01414&#8243; header_3_font=&#8221;|600|||||||&#8221; custom_padding=&#8221;15px|15px|54px|4px|false|false&#8221; global_colors_info=&#8221;{}&#8221;]<\/p>\n<h2><b>What do you mean by Cube root of 3375?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">When a number is multiplied by itself three times to give a product of 3375, then that number is the cube root of 3375.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3375 = 15 \u00d7 15 \u00d7 15<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Now we can see that the cube root of 3375 is 15<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It can be also written as<span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{3375} \\text { or } 3375^{1 \/ 3}<\/span><\/span><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">We are going to find out the cube root using two methods:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Prime factorization method<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Estimation method<\/span><\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<h2><b>Prime factorisation method<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">This is the easiest method to find out the cube roots but it becomes quite lengthy when we have to find cube roots of large numbers.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We have to follow the following steps<\/span><span style=\"font-weight: 400;\"><\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">First, we have to do the prime factorisation of 3375. It is usually done by dividing the number by the smallest possible prime factor. In this case, we have to divide it by 3 first. We have to divide it by prime numbers until the last quotient is 1. It is done as follows.<\/span><span style=\"font-weight: 400;\"><\/span><\/li>\n<\/ol>\n<p style=\"text-align: center;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eistudymaterial.s3.amazonaws.com\/Cube-root-of-3375-02-1-213x300.png\" width=\"251\" height=\"354\" alt=\"\" class=\"wp-image-6899 alignnone size-medium\" srcset=\"https:\/\/eistudymaterial.s3.amazonaws.com\/Cube-root-of-3375-02-1-213x300.png 213w, https:\/\/eistudymaterial.s3.amazonaws.com\/Cube-root-of-3375-02-1.png 235w\" sizes=\"(max-width: 251px) 100vw, 251px\" \/><\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">2. Now we can write,<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3375 = 3 \u00d7 3 \u00d7 3 \u00d7 5 \u00d7 5 \u00d7 5<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">3. After getting the prime factors we have to divide them into groups of threes containing the same factors.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here the first group contains 3 \u00d7 3 \u00d7 3 and the second group contains 5 \u00d7 5 \u00d7 5<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3375 = (<\/span><span style=\"font-weight: 400;\">3 \u00d7 3 \u00d7 3)<\/span><span style=\"font-weight: 400;\"> \u00d7 (<\/span><span style=\"font-weight: 400;\">5 \u00d7 5 \u00d7 5)<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">4. Now we have to take 1 number from each group.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Here we take 3 from the first group and 5 from the second group.<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">5. We have to multiply the factors we got from each group.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">This product is the cube root of 3375.<\/span><\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eistudymaterial.s3.amazonaws.com\/3375-300x131.png\" width=\"364\" height=\"159\" alt=\"\" class=\"wp-image-6958 alignnone size-medium\" srcset=\"https:\/\/eistudymaterial.s3.amazonaws.com\/3375-300x131.png 300w, https:\/\/eistudymaterial.s3.amazonaws.com\/3375.png 396w\" sizes=\"(max-width: 364px) 100vw, 364px\" \/><\/p>\n<h2><b><\/b><\/h2>\n<h2><b>Estimation method<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">This method takes less time as compared to the previous one. We can use it for finding cube roots of large numbers that are perfect cubes.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">We have to follow the following steps<\/span><\/p>\n<p><span style=\"font-weight: 400;\">1. First, the number is divided by making groups of three digits from the right side.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If the last group on the left side doesn\u2019t have 3 digits, it is okay and we will consider that group as it is.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Two groups are formed in this case as shown below. 375 is the first group and 3 is the second group.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3<\/span> <span style=\"font-weight: 400;\">3 7 5<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">2. The unit place of the first group from the right determines the unit place of the cube root of the number.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Refer to the following lookup table\u00a0<\/span><\/p>\n<p style=\"text-align: center;\"><span style=\"font-weight: 400;\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/eistudymaterial.s3.amazonaws.com\/Cube-root-of-3375-01-1-270x300.png\" width=\"348\" height=\"387\" alt=\"\" class=\"wp-image-6901 alignnone size-medium\" srcset=\"https:\/\/eistudymaterial.s3.amazonaws.com\/Cube-root-of-3375-01-1-270x300.png 270w, https:\/\/eistudymaterial.s3.amazonaws.com\/Cube-root-of-3375-01-1.png 452w\" sizes=\"(max-width: 348px) 100vw, 348px\" \/><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><span style=\"font-weight: 400;\">So, the unit place of the first group 375 is 5. By referring to the above table, we know that the unit place of the <span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{3375} \\text { is } 5<\/span>.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3. Now we will look at the second<\/span><span style=\"font-weight: 400;\">\u00a0group from the right.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">It contains only 1 digit i.e., 3.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3 lies between the <span class=\"katex-eq\" data-katex-display=\"false\">\\left(1^{3}=1\\right) \\text { and }\\left(2^{3}=8\\right) \\text { and the smaller number is }\\left(1^{3}=1\\right) \\text {. }<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\">Hence, the digit in the tens place of <span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{3375} \\text { is } 1<\/span><\/span><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">4. Therefore we can conclude that 15 is the <span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{3375}<\/span>.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><b>Solved Examples<\/b><\/h2>\n<p><b><\/b><\/p>\n<p><b>1. What is the cube root of 27000?<\/b><\/p>\n<p><strong>Solution:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">27000 = 3375 \u00d7 8<\/span><\/p>\n<p><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{27000}=\\sqrt[3]{(3375 \\times 8)} <\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><br \/><span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{27000}=\\sqrt[3]{(3375)} \\times \\sqrt[3]{(8)}<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\">We already know that <span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{3375} \\text { is } 15 \\text { and } \\sqrt[3]{8} \\text { is } 2<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{27000}=15 \\times 2 <\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><br \/><span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{27000}=30<\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\"><\/span><\/p>\n<p><b>2. What is the length of each side of a cube if its volume is 3375 m<\/b><b>\u00b3<\/b><b>?<\/b><\/p>\n<p><strong>Solution:<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The volume of a cube = side \u00d7 side \u00d7 side<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Side = cube root of the volume\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0= <span class=\"katex-eq\" data-katex-display=\"false\">\\sqrt[3]{3375} <\/span><\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0 \u00a0= <span class=\"katex-eq\" data-katex-display=\"false\">15 \\mathrm{~m}<\/span><\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][et_pb_column type=&#8221;2_5&#8243; module_id=&#8221;stickysideR&#8221; admin_label=&#8221;Column R&#8221; _builder_version=&#8221;4.10.4&#8243; _module_preset=&#8221;default&#8221; background_color=&#8221;#fdefe0&#8243; custom_padding=&#8221;25px|25px|25px|25px|true|true&#8221; sticky_position=&#8221;top&#8221; 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What is a perfect cube?<br \/><\/strong><\/h3>\n<p><span style=\"font-weight: 400;\"><strong>Ans: <\/strong>If the cube root of a number is an integer, then we can say that the number is a perfect cube.<strong><br \/><\/strong><\/span><span style=\"font-weight: 400;\"><\/span><\/p>\n<h3><strong>Q2. Is 3375 a perfect cube?<br \/><\/strong><\/h3>\n<p><strong>Ans: <\/strong><span class=\"katex-eq\" data-katex-display=\"false\">\n\\sqrt[3]{3375}=15\n<\/span><br \/>15 is an integer.<\/p>\n<p><span style=\"font-weight: 400;\">Hence 3375 is a perfect cube.<\/span><strong><\/strong><\/p>\n<h3><strong>Q3. What is the relation between cube and cube roots?<br \/><\/strong><\/h3>\n<p><strong>Ans:\u00a0 <\/strong><span style=\"font-weight: 400;\">The cube of a number is the product we get when the number is multiplied by itself three times.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><span style=\"font-weight: 400;\">The cube root of a number when multiplied by itself three times to give us the number.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">They are inverse processes.<\/span><span style=\"font-weight: 400;\"><br \/><\/span><span style=\"font-weight: 400;\">729 is the cube of 9 but 9 is the cube root of 729.<\/span><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Meta Description: We can calculate the sum of the terms in a geometric progression using the formula  S = a(1-r^n)\/(1-r) when r < 1 and  S = a(r^n-1)\/(r-1)when r>1<\/p>\n","protected":false},"author":10,"featured_media":0,"parent":714,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.6 - 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