A circular pond is of 17.5 m in diameter.It is surrounded by a 2 m wide path.Find the cost of constructing the path at the rate of Rs. 25 per m².
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A circular pond is of 17.5 m in diameter.It is surrounded by a 2 m wide path.Find the cost of constructing the path at the rate of Rs. 25 per m².
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outer circle radius= (17.5/2)+2=10.75m
outer circle area= pi*r2=3.14*(10.75)2
=3.14*115.5625
=362.86625 m2
inner circle radius= 17.5/2=8.75m
inner circle area=pi*r2=3.14*(8.75)2
=240.40625 m2
Area of the path= 362.86625-240.40625
=122.46 m2
cost of constructing it= 25*122.46
=Rs 3061.5
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