A boat requires 20 min to go 10 km along the stream and it requires 30 min to go 10 km against the stream. Find the speed of the current of the stream .
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us=c-w
ds=c+w
convert 20min in hours 20/60=1/3
similarly 1/2
us=10/(1/3)=30 km/h
ds=10/(1/2)=20km/h
add both upper stream and down stream
2c=50
c=25
boat speed =25
water=25+w=30
w=5
ds=c+w
convert 20min in hours 20/60=1/3
similarly 1/2
us=10/(1/3)=30 km/h
ds=10/(1/2)=20km/h
add both upper stream and down stream
2c=50
c=25
boat speed =25
water=25+w=30
w=5
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