SOLUTION: A fishing boat broke down after traveling 2 hours against a 4 km/hr current. The boat was carried back to its starting point by the current. The whole trip took 5.5 hours. Find the
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Question 548626: A fishing boat broke down after traveling 2 hours against a 4 km/hr current. The boat was carried back to its starting point by the current. The whole trip took 5.5 hours. Find the speed of the boat in still water before the motor failed.
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
Let the boat speed be x mph
against current (x-4)mph
distance traveled before breakdown = 2(x-4)
upstream
time =2 hours
return
time =
2(x-4)/4
2(x-4)/4 + 2 = 5.5
1/2(x-4)=3.5
x-4 = 7
x=11 mph
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