Question

The volume of a cube is 64 cubic feet. Which is the surface area? The answer is 96ft^2 how did they solve it?

Answer 1

A cube has all sides of same length..

vol. of cube = l^3
you have volume.. find the length .. can u do that first?

Answer 2

And is it 32

Answer 3

the value of l?? No.. try doing again

64 = l^3

take cube root on both side.

Answer 4

is it 4?

Answer 5

yes..
so, l = 4
means all sides have length 4

now do u know the formula for surface area of cube?

Answer 6

6a^2

Answer 7

yeah.. basically "a" is the length.. so just plug in the values you will get the answer.

Answer 8

oh ok I get it! thank you!! :)

Answer 9

you're welcome..