The velocity of a river is 2 km/hr. How much time is required to travel a boat in that river for 10 km. downstream them 10 km. upstream. Velocity of boat is 3 km/hr in still water.

A boat covers 24 km upstream and 36 km downstream in 6 hours, while it covers 36 km upstream and 24 km downstream is 13/2 hours. What is the velocity of the current?

A car can travels 450 km in 4 hours. If the speed is decreased by 15 1/2 kmph, how much time does the car take to cover a distance of 873 km?

The speed of a car is 63 km/hr, if we don't let it stop at any point. If the car stops at stops, the speed of the car is 54 km/hr. What is the time in minutes that the car stops for per hour?

A man can row a boat at 25/9 meters per second in still water and the speed of the stream is 8 kmph. What is the time taken (in hours) to row a distance of 90 km down the stream?