Boats And Streams Important Concepts And Formulas
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. speed upstream=(u-v)km/hr. 3.If the speed downstream is a km/hr and the speed upstream is b km/hr,then :speed in still water=1/2(a+b)km/hrrate of stream=1/2(a-b)km/hr
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