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A man covers a distance of 120 km at 40 km/h and returns at 60 km/h. What is his average speed?
A man covers a distance of 120 km at 40 km/h and returns at 60 km/h. What is his average speed?
A man covers a distance of 120 km at 40 km/h
Time taken = 120/40 = 3 hours
A man covers a distance of 120 km on the return journey at 60 km/h.
Time taken = 120/60 = 2 hours.
Average speed = Total distance travelled / Total time taken
Average speed = 240/5 = 48 km/hr
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