find the time taken by a boy to run around a rectangular field with length as 25 m and breath as 15 m, if he runs at a speed of 7.2 km/h
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perimeter of the rectangular field =2(length +breadth)
=2(25+15)
=2x40
=80m
speed =7.2km/h=7.2x1000/60x60
=2m/sec [convert to metre per second ]
time taken t=80/2
t=40 seconds
t=40/60=0.6min.
=2(25+15)
=2x40
=80m
speed =7.2km/h=7.2x1000/60x60
=2m/sec [convert to metre per second ]
time taken t=80/2
t=40 seconds
t=40/60=0.6min.
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