1.

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

A. 10.5 m
B. 3.5 m
C. 5.5
D. 7.5 m
Answer» C. 5.5


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