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A boat covers 25 km upstream and 44 km downstream in t hours. Also, it covers 15 km upstream and 22 km downstream in 5 hours.

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asked Jan 31, 2018 in Mathematics by sforrest072 (157,439 points) ● 61 ● 410 ● 942
edited Mar 5, 2018 by faiz

A boat covers 25 km upstream and 44 km downstream in t hours. Also, it covers 15 km upstream and 22 km downstream in 5 hours. Find the speed of the boat in still water and that of the stream.

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answered Jan 31, 2018 by mdsamim (213,225 points) ● 5 ● 10 ● 15
selected Jan 31, 2018 by sforrest072
 
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Let the speed of the boat in still water be r km/h and that of the stream be y km/h. Then,

Solving equations (u) and (ui), we get r = 8 and y =3. Hence, speed of the boat in still water is 8 km/h and speed of the stream is 3 km/h.

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