Question

A boat covers a certain distance downstream in 3 hours and it covers the same

distance upstream in 5 hours. If the speed of the boat in still water is 8 km/h. Find the

speed of the stream.​

Answer 1

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Downstream speed of boat = x + 3 {where x is the desired speed of boat in still water}

Upstream speed of board = x - 3

t1 (time to go downsteam ) = D/(x + 3) = 1 —-1)

t2 (time to go upstream) = D/( x -3) = 3/2 ——2)

The two equations above can be divided to work a solution for x.

(x-3)/(x+3) = 2/3

3(x -3) = 2(x + 3)

3x - 9 = 2x + 6

x = 15 km/hr

Answer 2

Answer:

15km/hr

Step-by-step explanation:

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