The side of a cube is 9 cm long.

what is the cube's surface area? cm2
a) 27
b) 729
c) 486

what is the cube's volume? cm3
a) 27
b) 729
c) 486

A cube has six identical square sides each having an area of s^2, so the surface area of a cube is:

A=6s^2  where s is a side length, in this case, s=9cm so

A=6(9^2)

A=6*81

A=486cm^2

The volume of a rectangular prism is:

V=xyz where x,y, and z are the dimensions, with a cube x=y=z=s because all dimensions are equal so:

V=s^3, and s=9cm in this case so

V=9^3

V=729cm^3

The answer would be 13.5 minutes.