The ratio of the volumes of two spheres is 64:125. What is the ratio of their radii?
Omar,
All you need to solve this problem is V = c* r^{3} where c=(4/3)π and is a constant. If we now apply this relationship to the problem we have 64/125=(r_{1}/r_{2})^{3 } solving for the ratio of the radii gives
(r_{1}/r_{2})=(64/125)^{1/3} =.8 or 4/5
Hope this helps
Jim