Q15 of 68 Page 16

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.


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


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