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Oliver
10-26-2013, 04:56 AM
What is the volume of a cube given that its surface area is 150 \ in^2?

(A) 75 \ in^3

(B) 100 \ in^3

(C) 125 \ in^3

(D) 250 \ in^3

Thanks!:D:D

nicole
10-26-2013, 04:57 AM
Let a be the length of the cube’s side. The surface area of the cube is 6a^2.

So, 6a^2=150 \Rightarrow a^2=25 \Rightarrow a=5 \ in

Finally, the volume of the cube is equal to a^3=5^3=125 \in^3

Therefore the correct answer is (C).

Hope these help!!;)

Oliver
10-26-2013, 04:58 AM
Thanks nicole!;)