Thursday, February 3, 2011

Important formula for Boats and Streams

                                        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.
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/hr
 
rate of stream=1/2(a-b)km/hr

1 comment:

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