Question 1045497

Maricris rides her power boat up and down the Agno river. The water in the river flows at 6 miles per hour. Maricris takes 5 hours longer to travel 360 miles against the current than she does to travel 360 miles along with the current. What is the speed of Maricris boat in still water?
<pre>Boat speed in calm water: {{{highlight_green(matrix(1,2, 30, mph))}}}