Question

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

Answer 1

8 times the volume with increased then the original volume

Answer 2

normal volume of cube of edge a =
${a}^{3}$
if edge is doubled then edge = 2a
then new volume =
${(2a)}^{3} \\ = {8a}^{3}$
now volume increased by
$\frac{8 {a}^{3} }{ {a}^{3} } = 8$
therefore volume increased by 8 times