Question

the perimeter of one face of a cube is 40 cm find its volume in cm^3

Answer 1

one face of a cube is a square.
so perm=4s=40 cm
s=40/4=10 cm

volume = s×s×s=10×10×10=1000 cm^3

Answer 2

Perimeter of cube face = a^2
40 = a^2
√40 = a
a = 2√10 cm



Volume of cube=a^3
=(2√10)^3
=80√10 cm ^3




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