A park is in form of a square one of whose side is 100m.the area of the park excluding the circular lawn in the centre of the park is 8614 sq.m. The radius of circular lawn is?
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Answer:
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
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