Question

If the edge of a cube is doubled then its volume increases by ……………. times.

A) 9 

B) 16 

C) 8 

D) 18

Answer 1

Correct option is (C) 8

Let side of original cube = a. Then side of new cube = 2a.

Volume of new cube \(=(2a)^3=8a^3\)

\(=8\times\) Volume of original cube

\(\therefore\) If the edge of a cube is doubled then its volume increases by 8 times.

Answer 2

Correct option is  C) 8