A boat travel 40km upstream in a river in the same period of time as it takes to travel 50km downstream. if the rate of stream be 5km/hr, find the speed of boat in still water.
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let speed of boat = x km/hr
for upstrean
speed=x-5
t=d/s=40/(x-5)
for downstream ,
speed=x+5
t=50/(x+5)
acc to ques,
40/(x-5)=50/(x+5)
40(x+5)=50(x-5)
200+250=10x
450=10x
x=45km/hr
MARK AS BRAINLIET UF YOU THINK
for upstrean
speed=x-5
t=d/s=40/(x-5)
for downstream ,
speed=x+5
t=50/(x+5)
acc to ques,
40/(x-5)=50/(x+5)
40(x+5)=50(x-5)
200+250=10x
450=10x
x=45km/hr
MARK AS BRAINLIET UF YOU THINK
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