Question 1036631

My brother and I have to whitewash both sides of a fence. We start at the same time, and we each work at a constant rate. If we each whitewash one side, I'll finish in 2 hours and my brother will finish in 3 hours. After I finish my side, I go around to the other side and help my brother finish his side. From the time I start helping him, how many minutes does it take us to finish the job?
<pre>Both take {{{highlight_green(matrix(1,5, 2/5, hour, or, 24, minutes))}}} to complete the remaining {{{1/3}}} of wall on brother's side.