how long would a boy take to complete a round of a circle Park whose radius is 210 if his speed is 3 kilometre per hour
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Given Radius of the park = 210 m
circumference = 22/7 * 2 * 210 = 1320 m2
speed = 3000 m per hr
3000m ran in = 60 min
1 m ran in = 60 / 3000 min
210 m ran in = 4.2 mins
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