SOLUTION: A motor boat goes downstream twice as fast as upstream. Find the power speed of the boat if the water flows at 6km/h.
This is what I've came up with:
Let x be the time of goi
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Question 906532: A motor boat goes downstream twice as fast as upstream. Find the power speed of the boat if the water flows at 6km/h.
This is what I've came up with:
Let x be the time of going upstream
(and I'm terribly stuck)
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
upstream speed be x
downstream speed =2x
boat speed = y
upstream
y-6=x............(1)
downstream
y+6=2x
y=2x-6
2x=y+6
x=(y+6)/2.................(2)
equate both
(y+6)/2 = y-6
y+6=2y-12
y=18
18km/h speed of boat
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