A train travels for 30 minutes with a velocity of 54 km/h and then for 120 minutes with a velocity of 72 km/h in the same direction. Calculate the average velocity of the train.
On a 120 km track, a train travels the first 30 km with a uniform speed of 30 km/hr . How fast must the train travel the next 90 km so as to average 60 km/hr for the entire trip?
On a 120 m track, a train travels the first 30 km at a uniform speed of 30 km/hr.calculate speed with which the train should rest of the track so as to get the average speed of 60 km/hr for the entire trip?