Question

Fill in the blanks
If each edge of a cube is doubled,then the surface area of the new cube will become _____ times.

Answer 1

Let the original edge of cube be $a$.

Original surface area $=6a^2$

Since, each edge of the cube is doubled, then

The surface area will be

$=6\times (2a{)}^2$

$=4\times 6a^2$

Hence, the surface area of the new cube will become $4$ times.