Chapter motion and time..
Rohan covers a distance of 10 kms by running with speed of 4.5 km/h.
Sohan covers a distance of 1.2 km in 15 minutes. Who runs faster?
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Explanation:
speed of Rohan to cover 10 km = 4.5 km/h here, 4.5 km/h in m/s = 45/10 * 5/18 = 12.5 m/s time = distance / speed = 10 / 12.5 = 0.8 m/s distance covered by sohan = 1.2 km. time taken = 15 minutes. speed = distance / time = 1.2/15 = 0.08 m/s therefore Rohan run faster
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