A man rowing at the rate 4 km an hour takes thrice as much time to go 30 km up a river as in going 30 km down. Find the rate at which the river flows.

A man rowing at the rate of 5 km per hour in still water takes thrice, as much time in going 40 km up the river as in going 40 km down. Find the rate at which the river flows.

A person can row a boat at the rate of 5 km/hour in still water. He takes thrice as much time in going 40 km upstream as in going 40 km downstream. Find the speed of the stream.

A person can row a boat at the rate of 5 km/hour in still water. He takes thrice as much time in going 40 km upstream as in going 40 km downstream. Find the speed of the stream.

A person can row a boat at the rate of 5 km/hour in still water.He takes thrice as much time in going 40km upstream as in going 40km downstream.Find the speed of the stream.

A boat which travels at the rate of 10.5 km/hr downstream takes 3 times as long time to go to a certain distance up a river as to go the same distance down. Find the rate at which stream flows.

A boat which travels at the rate of 10.5 km/hr downstream takes 3 times as long time to go to a certain distance up a river as to go the same distance down. Find the rate at which stream flows.

A man can row 15 km/h in still water and he finds that it takes him twice as much time to row up than as to row down the same distance in the river.The speed of the current (in km/h)is:

A man can row 15 km/h in still water and he finds that it takes him twice as much time to raw up than as to row down the same distance in the river. The speed of the current (in km/h) is :