A person observed that he required 30 s time to cross a circular ground along its diameter than to cover it once along the boundary. If his speed was 30m/min, than the radius of the circular ground is (take = 22/7)

A person observed that he required 30 s time to cross a circular groun

1.	A person observed that he required 30 s time to cross a circular ground along its diameter than to cover it once along the boundary. If his speed was 30m/min, than the radius of the circular ground is (take = 22/7)
A.	10.5 m
B.	3.5 m
C.	5.5 m
D.	7.5 m
Answer» C. 5.5 m

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A person observed that he required 30 s time to cross a circular ground along its diameter than to cover it once along the boundary. If his speed was 30m/min, than the radius of the circular ground is (take = 22/7)

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