Question

The volume of a cube is 729 cm³.find its total surface area.

Answer 1

Side =x
vol.=l​×l×l
729=l3
${729}^{3 } = l \\ l = 9cm$

Answer 2

volume of cube =729
a3=729
a= 9
(ii) total surface area of cube =6a2
=6(9)^2
=6x81
=486
therefore total surface area of cube is 486 cm2