A circular field of radius 41 m has a circular path of uniform width 5 m along and inside it's boundary. find the cost of paving the path at ₹ 25 per square meter.
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Answered by
56
radius of circle= 41m
inner radius = 41-5 = 36m
area of path =π(41^2 - 36^2) = 1209.5 m^2
cost = 1209.5 × 25 = 30237.8
inner radius = 41-5 = 36m
area of path =π(41^2 - 36^2) = 1209.5 m^2
cost = 1209.5 × 25 = 30237.8
Answered by
26
The area of circular field is pi x 41 x41=5278.34 m2 The area of the smaller circle formed because of the path has a radius of 41-5m=36m. Area of smaller circle= pi x 36 x36 m2=4069.44 m2 Area of path= 5278.34 - 4069.44 m2= 1208.9 m2 Cost= 1208.9 x 25 Rs = 30222.5 Rs
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