Question
Ram covers first 45 km at the speed of 15 km/hr. He
covers next 40 km at the speed of 20 km/hr. He covers next 60 km at the speed of 30 km/hr. What is the average speed of Ram?Solution
ATQ, Total distance covered = 45 + 40 + 60 = 145 km Total time = (45/15) + (40/20) + (60/30) = 7 hr ∴ Average speed = 145/7 kmph
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