how long will a man take to make a of a circular field of radius 21 m.cycling at the speed of 8km/h?
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To complete a round he covers distance equal to circumference
so
distance = 2 × pie ×r
=2×22/7×21
=132m
speed=8km/h
=8×5/18
=20/9m/s
time=distance /speed
=132÷20/9
=132×9/20
=6.6×9
=59.4 sec
= approximately 1 minute
so
distance = 2 × pie ×r
=2×22/7×21
=132m
speed=8km/h
=8×5/18
=20/9m/s
time=distance /speed
=132÷20/9
=132×9/20
=6.6×9
=59.4 sec
= approximately 1 minute
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