If radius increased by 50%, area increases by:

The correct answer is C. New r=1.5r. New area=π(1.5r)²=2.25πr². Increase=(2.25-1)/1×100=125%.

Question

Accepted Answer

New r=1.5r. New area=π(1.5r)²=2.25πr². Increase=(2.25-1)/1×100=125%.