Question

a streamer going downstream in a river covers the distance between two towns in 20 HR coming back upstream it covers the distance in 25 HR the speed of water is 4 km per hour find the distance between the two towns first find the speed of the stream in still water

Answer 1

Let the distance between two towns be x kilometers.
Speed downstream = x/20 km/hr
Speed upstream = x/25 km/hr
Speed of stream = 4 km/hr

Original Speed = (x/20 - 4) km/hr
or, (x/25 + 4) km/hr

A/Q

x/20 - 4 = x/25 + 4
=> x/20 - 8 = x/25
=> x/20 - x/25 = 8
=> x/100 = 8
Therefore, x = 800 kms. Ans.