Amotor boat traveled 18 miles down a river in 2 hours but took 4.5 hours to return upstream. find the rate of the motor boat in still water and the rate of the current. (round to the nearest tenth).

Explanation:

1) Name the two variables:

With that, the net rates of the boat down the river and upstrean are:

2) Now set the equations for the distance as a function of the times and the rates:

3) Set the system of equations:

4) Solve the system by elimination:

       4 = 6.5 - c ⇒ c = 6.5 - 4 = 2.5

5) Results:

the answer is 2/54

step-by-step explanation:

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