A park is in the form of a rectangle 120m×100m. At the centre of the park there is a circular lawn. The area of park excluding lawn is 8700m 2 . Find the radius of the circular lawn.

Question

A park is in the form of a rectangle 120m&#xD7;100m. At the centre of the park there is a circular lawn. The area of park excluding lawn is 8700m 2 . Find the radius of the circular lawn.

Philoid · Accepted Answer

Total area of rectangular park = 120×100 = 12000 m²

Area of park excluding circular lawn = 8700m²

So,

Area of circular lawn = 1200 – 8700 = 3300m²

= πr² = 3300

r = 32.40 m

A park is in the form of a rectangle 120m×100m. At the centre of the park there is a circular lawn. The area of park excluding lawn is 8700m2. Find the radius of the circular lawn.

A park is in the form of a rectangle 120m×100m. At the centre of the park there is a circular lawn. The area of park excluding lawn is 8700m². Find the radius of the circular lawn.