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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 8

If the cube of a squared number is 729, find the square root of that number - Mathematics

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Question

If the cube of a squared number is 729, find the square root of that number

Sum

Solution

729 = `bar(3 xx 3 xx 3) xx bar(3 xx 3 xx 3)`

`(729)^(1/3)` = 3 × 3 = 9

∴ The cube of 9 is 729.

9 = 3 × 3 ...[i.e. 3 is squared to get 9]

We have to find out `sqrt(3)`

`sqrt(3)` = 1.732

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Chapter 1: Numbers - Exercise 1.5 [Page 39]

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Samacheer Kalvi Mathematics [English] Class 8 TN Board
Chapter 1 Numbers
Exercise 1.5 | Q 9 | Page 39
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