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.
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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.
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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:
15km/hr
Step-by-step explanation:
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