Oh okay...Assuming that the " r " in " 13r " stands for the radius......
The formula for the surface area of a sphere is:
surface area = 4Ο r2 Replace " surface area " with " 13r ".
13r = 4Ο r2 Divide both sides of the equation by r.
13 = 4Ο r Divide both sides of the equation by 4Ο.
13/(4Ο) = r
So, the radius = 134Ο units
The formula for the volume of a sphere is:
volume = 43Οr3 Replace " r " with " 134Ο ".
volume = 43Ο(134Ο)3 Simplify.
volume = 43Ο(219764Ο3)=43(219764Ο2)=219748Ο2 cubic units