Question

The surface area of a sphere is 2464 $c{m}^2.$ If its radius be doubled, what will be the surface area of the new sphere?

Answer 1

The surface area of a sphere is given by $4\pi r^2$

So, it is proportional to the square of the radius.

If the radius is doubled, surface area will become 4 times.

New surface area = $4\times 2464=9856c{m}^2$