SOLUTION: The current on a portion of the Mississippi River is 3 miles per hour. A barge can go 6 miles upstream in the same amount of time it takes to go 10 miles downstream. Find the spe

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Question 894989: The current on a portion of the Mississippi River is 3 miles per hour. A barge can go 6 miles upstream in the same amount of time it takes to go 10 miles downstream. Find the speed of the boat in still water.


Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
The current on a portion of the Mississippi River is 3 miles per hour. A barge can go 6 miles upstream in the same amount of time it takes to go 10 miles downstream. Find the speed of the boat in still water.
***
let x=speed of boat in still water
(x+3)=speed of boat downstream
(x-3)=speed of boat upstream
Travel time=distance/speed
..
6/(x-3)=10/(x+3)
10x-30=6x+18
4x=48
x=12
speed of the boat in still water=12 mph