SOLUTION: if i double the radius does the inside area increase?

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts  -> Lessons -> SOLUTION: if i double the radius does the inside area increase?      Log On


   

Question 494666: if i double the radius does the inside area increase?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
if i double the radius does the inside area increase?
-----
Area before doubling the radius = (pi)r^2
-----
Area after doubling the radius = (pi)(2r)^2 = 4(pi)r^2
----
Ans: If radius is doubled the area is multiplied by 4.
Cheers,
Stan H.
==============