A train travels from A to B at the rate of 20km/hr and from B to A at the rate of 30km/hr,find the average speed.
Jagan went to another town covering 240km by car moving at 60km/hr. Then he covered 400km by train moving at 100km/hr and the rest 200km he covered by bus moving at 50km/hr.The average speed during the whole journey is:
Two trains are travelling in the same direction with speeds of 30km/hr and 58km/hr respectively.A man in the slower train passes the faster train in 18s.Find the length of the faster train.