Kellen's boat travels 15 mph. find the rate of the river current if she can travel 2 mi upstream in the same amount of time she can go 4 mi downstream. (let xequalsthe rate of the current.)

The rate of the current is 5 mph.

Step-by-step explanation:

Given : Kellen's boat travels 15 mph. If she can travel 2 mi upstream in the same amount of time she can go 4 mi downstream.

To find : The rate of the river current ?

Solution :

Let x be the rate of the currents .

The downstream speed is 15+x.

The upstream speed is 15-x.

We know that,  

Upstream time = Downstream time

Cross multiply,

Therefore, the rate of the current is 5 mph.

1.5%

step-by-step explanation: