SOLUTION: I'm running a pizza business and are circular in shape,with the diameter of 23cm so if charge 5c per cm squired how much would it cost in rands?

Algebra ->  Circles -> SOLUTION: I'm running a pizza business and are circular in shape,with the diameter of 23cm so if charge 5c per cm squired how much would it cost in rands?      Log On


   

Question 1086143: I'm running a pizza business and are circular in shape,with the diameter of 23cm so if charge 5c per cm squired how much would it cost in rands?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Use the area of a circle,
A=pi%28D%2F2%29%5E2=%28pi%2F4%29D%5E2=%28pi%2F4%29%2823%29%5E2
So the cost would be that cost per area multiplied by the area,
C=0.05A
C=%281%2F20%29%28pi%2F4%29%28529%29
C=%28529%2F80%29pi
I'm assuming there are 100 cents in a rand.
C is in units of rands.
Work out the final answer with a calculator.