Question

If each edge of a cube, of volume V, is doubled, then the volume of the new cube is

A. 2 V

B. 4 V

C. 6 V

D. 8 V

Answer 1

Correct option is D. 8 V

Given,

Let original edge of cube = a

Then original volume of cube = a³

New edge of cube = 2a

New volume of cube

= (2a)³ = 8a³ = 8v ∵ v = a³