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# Which of the following is the value of root{3rd rt{0,000064}

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Current Student
Joined: 27 Mar 2016
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Re: Which of the following is the value of root{3rd rt{0,000064}  [#permalink]

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19 Jun 2016, 01:44
The number is 64 / 1,000,000. Third root of 64 is 4, and third root of the other number is 100. So the answer is the square root of (4/100) which is clearly 0.2.
Manager
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Re: Which of the following is the value of root{3rd rt{0,000064}  [#permalink]

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22 Jun 2017, 09:59
Solution:

cube root of 0.000064=0.04

Sq.root of 0.04= 0.2

Manager
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Re: Which of the following is the value of root{3rd rt{0,000064}  [#permalink]

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13 Sep 2017, 21:27
to find cube root of .000064
there are 6 digits after point in .000064 so in cube root there should be 2 digits after point
cube root of 64 is 4
so cube root of .000064 = .04(2 digits after point)
again square root of .04
here there are 2 digits after point so in square root there should be one digit
so Square root of .04 = .2

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Re: Which of the following is the value of root{3rd rt{0,000064}  [#permalink]

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13 Sep 2017, 21:54
Sqrt((64x.000001)^1/3)
Sqrt(4x0.01)
2x0.1
0.2

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Re: Which of the following is the value of root{3rd rt{0,000064}  [#permalink]

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06 Oct 2018, 11:37
Hello from the GMAT Club BumpBot!

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Re: Which of the following is the value of root{3rd rt{0,000064}   [#permalink] 06 Oct 2018, 11:37

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