A person is going to school. He found that he has reached 600m in 1 minute. His velocity is 10 m/s. Calculate how much more time he needs to reach his school which is 1200m north from his home
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The conventional approach to this question would be to find the velocity in metres per second, and then convert it to kilometres per hour.
But the easiest approach is more simple:
Distance = 600m = 0.6km
Time = 5min = (5/60)hrs = (1/12)hrs
Speed = Distance/Time = (0.6)/(1/12) = 12(0.6) = 7.2kmph
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