Question

a circular Park surmounted by a Road 21 metre wide if radius the park is 105 M find the area of the road

Answer 1

Find the area of the park:

Radius = 105m

Area = πr²

Area = π(105)² = 11025π m²

Find the radius of the park and road:

Radius = 105 + 21 = 126 m

Find the area of the park and the road:

Radius = 126m

Area = πr²

Area = π(126)² = 15876π m²

Find the area of the road:

Area of the road = 15876π - 11025π = 4851π = 15246 m²

Answer: The area of the road is 15246 m²