SOLUTION: Suppose that a sphere of a radius of 5 centimeter was reduced to a sphere of 4cm.By how much did the total surface are decreased?

Algebra ->  Surface-area -> SOLUTION: Suppose that a sphere of a radius of 5 centimeter was reduced to a sphere of 4cm.By how much did the total surface are decreased?      Log On


   

Question 1096202: Suppose that a sphere of a radius of 5 centimeter was reduced to a sphere of 4cm.By how much did the total surface are decreased?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
r for radius,
Surface area for a sphere is 4%2Api%2Ar%5E2;
Go from there.