Step-by-step explanation:

surface area of a cube 6a^2

so 6a^2=216

a^2=36

a=6

so volume a^3= 6^3= 216cm^3

Answer:

Surface area of cube is 6a^2

6a^2 = 216 cm^2

a^2 = 216/6

a^2 = 36

a = sqrt(36)

a = 6 cm

Volume of cube is a^3

= 6^3

= 216

volume of the cube is 216 cm^3