A park is in the form of a square one of whose sides is 100 m . The area of the park excluding the circular lawn in the centre of the park is 8614 m 2. The radius of the circular lawn is?
Correct Answer: 21 m
Explanation:
Area of park = 100 x 100 = 10000 m2
Area of circular lawn = Area of park - area of park excluding circular lawn
= 10000 - 8614
= 1386 Now again area of circular lawn = (22/7) x r2 = 1386 m2
⇒ r2 = (1386 x 7) / 22
= 63 x 7
= 3 x 3 x 7 x 7 ∴ r = 21 m
