The radius of a circular garden is 100m. There is a road 10m wide, running all

The radius of a circular garden is 100m. There is a road 10m wide, running all

The radius of a circular garden is 100m. There is a road 10m wide, running all around it. Find the area of the road and the cost of levelling it at Rs. 20 per `m^(2)`. [Use `p=3.14`]