1. A man riding a bicycle, completes one lap of a circular field along its circumferences at the speed of 14.4 km/h in 1 min 28 s. What is the area of the field?






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  • By: anil on 05 May 2019 01.18 am
    Distance travelled in 1min 28 sec = Speed *time
    Speed = 14.4km/hr = 14.4*5/18 m/s = 4m/s
    Distance = 4*88 = 352
    $$2pi r = 352$$
    r = 56
    Area =$$pi r^2$$ = 22*56*56/7 = 9856
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