Question

a person rowing at the rate of 5km/hr in still water takes thrice as much in going 40km upstairs as in going 40km downstream. Find the speed of the stream​

Answer 1

Answer:

Speed of rowing by a person =5 km/hr.

Speed of stream =x km/hr

Upstream Speed =(5−x) km/hr

Downstream speed =(5+x) km/hr

According to the question,

⇒

5−x

40

=

5+x

3×40

⇒5+x=15−3x

⇒4x=10

⇒x=2.5 km/hr