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The floor of a company's storage room has an area, of 20,000

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The floor of a company's storage room has an area, of 20,000 [#permalink] New post 01 Aug 2019, 10:53
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Question Stats:

88% (01:04) correct 11% (01:25) wrong based on 9 sessions
The floor of a company's storage room has an area, of 20,000 square feet. If the floor is in the shape of a square, approximately how many feet long is each side?

(A) 140

(B) 450

(C) 500

(D) 1,000

(E) 5,000
[Reveal] Spoiler: OA

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Re: The floor of a company's storage room has an area, of 20,000 [#permalink] New post 06 Aug 2019, 09:37
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Factorize 20000 to its prime we get

\(20000 = 2*2*2*2*2*5*5*5*5\)
or, \(20000 = 2^4 *2 * 5^4\)
Taking square root of this we get \(2^2*5^2 * 2\)
which is equal to \(100\sqrt{2}\)

This is for understanding you can use the calculator to get the value in no time.
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Re: The floor of a company's storage room has an area, of 20,000   [#permalink] 06 Aug 2019, 09:37
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The floor of a company's storage room has an area, of 20,000

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