Question

On a 200 km track, a train travels the first 80 km at a uniform speed of 40 km/h. How fast the train must travel next 120 km so as to maintain the average speed of 50 km/h for the whole journey?

Answer 1

Answer:

The train's speed by maintaining the average speed 60 km/hr for the next 150 km is 72 km/hr.