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
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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
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