Question 1171821
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... traveled 1600 miles to Munich and back. The trip there was with the wind. It took 10 hours. The trip back was into the wind . The trip back took 16 hours. What is the speed of the plane <i>in still</i> air? what is the speed of the wind?
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Withe the wind, and against the wind, {{{system(r+w=1600/10,r-w=1600/16)}}}


{{{system(r+w=160,r-w=100)}}}


ADD corresponding members and simplify, {{{highlight(r=130)}}}, and w easily findable, {{{highlight(w=30)}}}.