List of top Quantitative Aptitude Questions on Boat and Stream

A man rows to a place 48 km distant and comes back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:

The speed of stream is $\frac{4{5}$ of the speed of a boat in still water. If the boat covers 198 km in 11 hours downstream, then find the difference of time taken by boat to cover 60 km in upstream and 36 km downstream.}

A boat which can travel at 10km/hr in still water goes 91km down a river and returns to the starting point in 20 hours. Find the speed of the flow of the river.