Find out the area of a circular pond having radius 14 cm. If a circular path of width 1 meter is to be built around the pond, what is the cost of planting the grass on the path at the rate of Rs15 per square metre?{π=22/7}
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Given radius(r)=2/17.5 m and width of the path(w)=2m
Area of path=π (R² - r²)
R=r+ω=
17.5/2+2=10.75m
∴Area=3.14(10.75²−8.75²)=122.46m²
Cost of construction = Rs. (122.46×25) = Rs. 3061.5
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