If the length of a diagonal of a cube is 8 
cm, then its surface area is
Given,
Length of diagonal of cube = 8√3 cm
∵ √3 a = 8√3
= 
= surface area of cube = 6 a2 = 6× 8×8 = 384 cm2
7
If the length of a diagonal of a cube is 8 cm, then its surface area is
Given,
Length of diagonal of cube = 8√3 cm
∵ √3 a = 8√3
=
= surface area of cube = 6 a2 = 6× 8×8 = 384 cm2