Question
A person goes 15 km at 5 km/h and returns 15 km at 3
km/h. Find the average speed for the whole journey.Solution
ATQ, Total distance = 15 + 15 = 30 km Time going = 15/5 = 3 h Time returning = 15/3 = 5 h Total time = 8 h Average speed = 30/8 = 3.75 km/h
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