on100km track a train moves the first 50km with uniform speed of 50kmh how fast must the train travel the next 50km so as to have average Speed 60 kmh for the entire trip
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The time taken to complete the journey = 50/50 + 50/v = 100/60
or 1 + 50/v = 5/3
or 50/v = 5/3 - 1 = 2/3
or v = 50 × 3/2 = 75 km/h
The train should go at 75kmph for next 50km
or 1 + 50/v = 5/3
or 50/v = 5/3 - 1 = 2/3
or v = 50 × 3/2 = 75 km/h
The train should go at 75kmph for next 50km
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