Question 1119624
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 into a headwind travels the 2080-mile flying distance between two cities in 5 hours and 12 minutes. On the return flight, the airplane travels this distance in 4 hours. Find the airspeed of the plane and the speed of the wind, assuming that both remain constant. 
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r, speed of plane if no wind
w, speed of wind
12 minutes is 0.2 hour or  {{{1/5}}} hour.

<pre>
RATE            TIME           DISTANCE

r-w             5.2            2080
r+w             4              2080
</pre>
{{{RT=D}}}
;
{{{R=D/T}}}
;


{{{system(r-w=2080/5.2,r+w=2080/4)}}}
You should be able to understand the information organized as shown and to continue from this system of equations.