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itu can row downstrcam 20 km in 2 hours, and upstream Akm in 2 honsrs.peed of rowing in still water and the speed of the current.atibhs, and hence tina theit solulions.hours.Fnd her㣠|
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Answer» Let speed of stream be y km/hand speed of boat be x km/hso speed of boat in downstream bex+ykm/hand speed of boat in upstream be x-y km/haccording to question,20/x+y=2=x+y=10......(1)and4/x-y=2x-y=2.....(2)(1)+(2)=x+y+x-y=10+2=2x=12=x=6km/h......(3)now putting value of (3)in (1)6+y=10y=4km/h |
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