convert a velocity of 72 km h-1 into ms-1 with the help of dimensional analysis
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11
1 km = 1000 m
1 hour = 3600 sec
72 Km/hr = 72 × 1000/3600 m/s = 20 m/s
1 hour = 3600 sec
72 Km/hr = 72 × 1000/3600 m/s = 20 m/s
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4
72×5÷18
=4×5
20m/s
......mark as best
=4×5
20m/s
......mark as best
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