Question

12. A 7 m wide road runs around a circular park whose
circumference is 176 m. Find the cost of fencing
the outer boundary of the road at the rate of 21
per m.​

Answer 1

Answer:

circumference of the park =2πr

176=2πr

176/2=πr

88=22/7*r

r=88*7/22

r=28

radius of park +r of road =35m

circumference of the circular road=2πr

=2*22/7*35

=220m

cost=21*220

=Rs 4620