SOLUTION: A circular walk has an outside radius of 25-ft and an inside radius of 20-ft. Compute the cost of constructing the walk if the labor and materials are estimated at a cost of $1.50

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Question 1197552: A circular walk has an outside radius of 25-ft and an inside radius of 20-ft. Compute the cost of constructing the walk if the labor and materials are estimated at a cost of $1.50 per sq. ft. Round your answer to the nearest whole dollar.
Found 2 solutions by ewatrrr, Alan3354:
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi 
 .
A = pi%2Ar%5B0%5D%5E2+-+pi%2Ar%5Bi%5D%5E2+=+pi%2825%5E2+-20%5E2%29+=+225pi+
At $1.50/ft^2, the cost of constructing the walk:  1.50%28225%2Api%29 = $1060 rounded
Wish You the Best in your Studies.


Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A circular walk has an outside radius of 25-ft and an inside radius of 20-ft. Compute the cost of constructing the walk if the labor and materials are estimated at a cost of $1.50 per sq. ft. Round your answer to the nearest whole dollar.
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Find the area of the larger circle, subtract the area of the inner circle (in sq feet).
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Multiply by $1.50