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Finding Square Root through Prime Factorisation

What is squar...

Question

What is square root of 400?

A

20

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B

10

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C

11

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D

21

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Solution

The correct option is A
20

400 = 2 x 2 x 2 x 2 x 5 x 5

Hence, $\sqrt{(400)}$ = 2 x 2 x 5 = 20

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What is the square root of 400?

Q. Square root of

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Square root of 400 is 20.

Q. Find the square root of 400 by prime factorisation method.

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