The ratio between the speeds of two trains is 7 : 8. If the second train runs 400 kms in 4 hours then the speed of the first train is:
Walking at 2/3 of his usual speed a man is 2 hrs.late. Find his actual travel time
Mary jogs 9 km at a speed of 6 km per hour. At what speed would she need to jog during the next 1.5 hours to have an average of 9 km per hour for the entire jogging session?
The length of the bridge which a train, 130 metres long and travelling at 45 km per hour, can cross in 30 seconds, is
Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?