SOLUTION: a oad 3.5m wide surrounds a circular park whose circumference is 88m . find the cost of paving the road at the rate of RS 60 per square meter

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Question 838661: a oad 3.5m wide surrounds a circular park whose circumference is 88m . find the cost of paving the road at the rate of RS 60 per square meter
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
Hi there,
Consider the circular park:
Circumference = 88m
Pi * diameter = 88m
Diameter = 88m/Pi
Diameter = 28.0m
Radius = 28/2 = 14m
Add 3.5m (width of path) + 14m radius of park = 17.5.
Area of park + path = Pi * r^2 = Pi * 17.5^2
= 962.11m^2
Area of park = Pi * r^2 = Pi * 14^2
= 615.75m^2
962.11 - 615.75 = 346.36m^2
346.36m^2 * RS 60 = RS 20781.6
Hope this helps. :-)