In a race, an athlete covers a distance of 420 m in 140 sec in the first lap. He covers the second lap of the same distance in 70 sec. What is the average speed (in m/sec) of the athlete?
4
Average speed is total distance divided by total time taken.
Total distance \(= 420 + 420 = 840\) m.
Total time \(= 140 + 70 = 210\) sec.
Average speed \(= \dfrac{840}{210} = 4\) m/sec.
Hence, the average speed of the athlete is 4 m/sec.
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Important Questions from Average Speed
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A car has to cover 125 kms in 5 hours. What will be the average speed of the car if it has covered 90 kms in the first 3 hours?
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