Question

the perimeter of one face of cube is 40cm .find total surface area.

Answer 1

area of one face of cube = 10*10 = 100

therefore total surface area = 100* 6= 600cm

Answer 2

hey friend
here is ur answer
face of a cube is a square
perm of one face = perm of a square
40=4×a
a=40/4=10 cm

so
total surface area of a cube=6×a×a
=6×10×10=600 cm sq.