Question

a road which is 3 m.wide surrounds a circular park whose radius is 37 m.find the cost of construction of the road at the rate of Rs.20 per square meter

Answer 1

Yes then width of road = 3m
radius of park= 37m
area of park= pi r square
you do this then you have to obtain the area of Park including with the road with a radius 40 m then use abstract