Question 1025688

The distance between two piers on a river is 43.2 miles. It takes a motorboat, moving downriver, 2 hr 24 min to complete the journey. How much time does it take the same boat to go back upstream if the current flows at 1.8 mph?
<pre>Time to go back upstream: {{{highlight_green(matrix(1,2, 3, hours))}}}