Question 1173836
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The other tutor provided a good formal algebraic solution to the problem.<br>
If formal algebra is not required, note that a quick informal solution can be obtained by using logical reasoning and some simple mental arithmetic.<br>
Since the rate of the jet is 4 times the rate of the prop plane, 1600 miles by jet is equivalent to 400 miles in the prop plane.
That makes the trip equivalent to 700 miles on the prop plane in 10 hours.
That makes the speed of the prop plane 700/10 = 70mph; and then the speed of the jet is 4 times that, or 280mph.<br>
ANSWER: 280 mph for the jet.<br>