A boat travels 7.5 km upstream and 20 km downstream in 4 hours and 30 minutes. The same boat takes two hours less to travel 10 km downstream and 4.5 km upstream. Calculate the difference in speed of the boat with and against the flow?
1). 10 km/hr
2). 2 km/hr
3). 7 km/hr
4). 6 km/hr
Ramesh travels from the Shimla to Manali by car at a certain speed. When he comes back from Manali to Shimla, his speed is 60 km per hour. If the average speed for the whole journey is 72 km per hour, find his speed when he travels from the Shimla to Manali.
A train travels 20% faster than a car. Both start from point A at the same time and reach point B, 180 km away at the same time. On the way the train takes 30 minutes for stopping at the stations. What is the speed (in km/hr) of the train?
1). 56
2). 66
3). 72
4). 80
Two trains A and B are running on parallel tracks in same direction. Length of train A is twice that of train B. Both trains take an equal amount of time to cross a pole individually. If speed of train B is 60 km/hr and its length is 400 metres, then how much time will train A take to completely overtake train B?
1). 24 seconds
2). 36 seconds
3). 48 seconds
4). 54 seconds
How much time does a bus take to reach its destination 400 km away, if it covers half of its journey at a speed of 50 km/hr, 60% of the remaining journey at 60 km/hr. and the remaining at 80 km/hr?
1). 5 hrs
2). 6 hrs
3). 7 hrs
4). 8 hrs