List of top General Aptitude Questions on Boat and Stream

A man can row 24 km downstream in 3 hours and the same distance upstream in 6 hours. What is the speed of the boat in still water?
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, how far off (in km) is the place?
A man can go downstream thrice as fast as he can go upstream between two specific points on a river. If the river flows at 8 kmph, what is the speed of the boat in still water?