Distance between two stations a and b is 778km. a train covers the journey from a to b at 84km/hr and returns back to a with a uniform speed of 56km/hr. find the avg speed of train during whole journey.
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Distance =778km
initial speed =84km/h
final speed =56km/h
Total time taken = 2h
avg speed = Total distance /Total time taken
avg speed = 778×2/84+56 = 11.11
initial speed =84km/h
final speed =56km/h
Total time taken = 2h
avg speed = Total distance /Total time taken
avg speed = 778×2/84+56 = 11.11
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