A man can route upstrwam at 8kmph and downstream at 13kmphr the speed of the stream is
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let speed of boat be y km/he
let speed of stream be x km/hr
BTP,
Y+X=13.....(1)
Y-X=8......(2)
adding equations 1 and 2 we get,
2y=21
y=10.5
substituting value of y in equation 1,
10.5+ X= 13
X=2.5
Therefore, speed of stream is 2.5 kmph.
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