Question 1114108
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Here is a very different way you could solve this problem....<br>
The rate of the jet is 4 times the rate of the single engine plane; since the distances are the same, the time required for the small plane is 4 times the time required for the jet.<br>
let t = time for jet
then 4t = time for small plane<br>
The difference in flight time is 5 hours:
{{{4t-t = 5}}}
{{{3t=5}}}
{{{t = 5/3}}}<br>
The jet takes 5/3 hours for the flight of 930 miles; its speed is {{{930/(5/3) = 558}}} mph.<br>
The jet's speed is 4 times the small plane's speed; the speed of the small plane is {{{558/4 = 139.5}}} mph.