Question

a cyclist completes one round in a circular track of radius 35m in 1min calculate his speed

Answer 1

The cyclist travels 2×3.14×35 m in 60 sec.
Then his speed is =(2×3.14×35)/60 m/sec
= 3.655 m/sec

Answer 2

perimeter of the track=distance covered = 2×22/7×35=220
time=1min
speed =distance/time=220m/1min=220m/min