The speed of a boat in still water is 12 km/hr. If it can travel 48 km downstream and 24 km upstream in the same time, the speed of the stream is,

'A' rides a cycle at an average speed of 30 km/h and reaches the destination in 6 hours. B covers the same distance in 4 hours. If A increases the average speed by 10 km/h and B increases the average speed by 5 km/h What would be the difference in their time taken to reach the destination ?

A man can row a boat at 8 km/h in still water. If the speed of the water current is 2 km/h and it takes him 2 hours to row to a place and come back, then how far (in km) is the place ?

A sales agent travels a distance of 50 km in 2 hours and 30 minutes. How much faster, in kilometres per hour, on average, must he travel to make such a trip in 5/6 hours less time?

A train take 15 second to cross a pole. If the speed of the train is 60 km/hr, then length of the train is:

The speed of a 90 meter long train is 45 km/h. A man is standing right next to the railway line. How much time will the train take to cross the speed increases by 20%?

220 meter long train is running with a speed of 59 km/hr. In what time will it pass a man who is running at 7 km/hr in the direction opposite to that in which the train is going?