Question

A boat goes 30km up stream and 44 km downstream in 10 hours. It 13 hours it can go
40km. upstream and 55 km. downstream. Determine the speed of the stream and that of the
boat in still water.​

Answer 1

Answer:

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Answer 2

Answer:

let the speed of boat be x

and,speed of stream be y

therefore,speed in downstream=x+y

and,speed in upstream=x-y

therefore,44/x+y +30/x-y=10

and,55/x+y + 40/x-y=13

now solve