On a 120 km track a train travels 30 km at a uniform speed of 30 km/hr. How fast must the train travel the next 90 km do as to get average speed of 60 km/ hr for the entire tip
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Hi mate, here's your answer,
as the total distance = 120 km I average speed= 60 kmph
= total time duration = 120 / 60 = 2 hours
time taken for the first 30 km = 30 km /30 kmph = 1 hours
Hence, time remaining to cover the remaining 90 km = 2 hrs - 1 hrs = 1 hour
=speed during 90 km = 90 kmph
Hope this helps you!
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