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If a cube has a volume of 64, what is its total surface area?

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If a cube has a volume of 64, what is its total surface area? [#permalink]

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New post 06 Dec 2017, 23:04
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A
B
C
D
E

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Re: If a cube has a volume of 64, what is its total surface area? [#permalink]

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New post 07 Dec 2017, 05:26
Volume, a*a*a = 64 => a=4
Total Surface Area, Area of one side * Number of sides = a*a*6 = 96.
Option E.
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Re: If a cube has a volume of 64, what is its total surface area? [#permalink]

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New post 07 Dec 2017, 12:33
Bunuel wrote:
If a cube has a volume of 64, what is its total surface area?

(A) 16
(B) 24
(C) 48
(D) 64
(E) 96


Formula used: Volume of cube = \(a^3\) | Total surface area of the cube = \(6*a^2\)

Given : a^3 = 64.
Taking cube root on both sides, a = 4

Therefore, the surface area of the cube is \(6*a^2 = 6*16 = 96\)(Option E)
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Re: If a cube has a volume of 64, what is its total surface area?   [#permalink] 07 Dec 2017, 12:33
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