Formulae on Boats and Streams


 


1
In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream.



2
If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then Speed downstream = (u + v) km/hr



   3
If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then Speed upstream = (u -v) km/hr.



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