# Math Help - Stuck

1. ## Stuck

A speedboat takes 3 hours longer to go 60 miles up a river than to return. If the boat cruises at 15 miles per hour in still water, what is the rate of the current?

2. Originally Posted by pexler
A speedboat takes 3 hours longer to go 60 miles up a river than to return. If the boat cruises at 15 miles per hour in still water, what is the rate of the current?
let $x$ be the current speed in miles per hour, then the time (in hous to go upriver is:

$t_1=\frac{60}{15-x}$

and the time to go down river is:

$t_2=\frac{60}{15+x}$

and you are told that $t_1=t_2+3$.

CB