Question 1036908

making a round trip from fairview to cartersville, a distance of 20 miles, a pilot faces 30mph head wind one way and 30mph tail wind on the return trip. the return trip takes 45 minutes less than the outbound journey. find the speed of the plane in still air.
<pre>Speed in still air: {{{highlight_green(matrix(1,2, 50, mph))}}}