Question

if each edge of a cube is doubled then find how many times will it's volume increase

Answer 1

Let the edhr be x

Then volume will be x³

If x is doubled then edge =2x

Then, volume =(2x)³=8x³


Comparison between volume,

=8x³/x³

=8

=then volume is increased by 8 times

Answer 2

let the edge be 'a'
volume of cube= a^3
edge doubled = 2a
then volume = (2a)^3
                    = 8a^3
therefore the vol is increased 8 times