A streamer goes downstream from one point to another in a hours. It covers the same distance upstream in 10 hours . If the speed of the stream 1 km/hr, find the speed of the streamer in still.water and the distance between them.
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Answer :-
Let the speed of steamer = X km/hr
Speed of stream = 1 km/hr
Downstream speed = (X+1) km/hr
Upstream speed = (X-1) km/hr
Distance = Speed x Time
=> 1 (X+1) = 10 (X-1)
=> 1X +1 = 10X -10
X= 10+1= 11km/hr
Therefore, speed of the stream is 11km/hr
Distance travelled = 1 (X+1) 1 x 20 = 20km
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