SOLUTION: A boat can go 40 miles against the current in the same time it can go 80 miles with the current. If the speed of the current is 2 miles per hour, what is the speed of the boat?

Question 194734: A boat can go 40 miles against the current in the same time it can go 80 miles with the current. If the speed of the current is 2 miles per hour, what is the speed of the boat?
This problem does not give time, it just states that it is the same, thus making me confused on how to solve it. Please help....
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

If the boat goes twice as far, it must be going twice as fast. So if the speed of the boat in still water is r, then it must be going r - 2 against the 2 mph current, and r + 2 with the current.

And since it is going twice as fast with the current as against the current:

Just solve for r.

John

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