Question

two solid spheres have surface areas 144(pie)cm^2 and 256(pie)cm^2 respectively.they are melted and recast to form a larger sphere. find the surface area of this sphere in cm^2

Answer 1

General process:

1) Use given surface areas to get radii.
2) Use radii to get volumes .
3) Add volumes.
4) Use Volume to get radius then surface area.