<PRE><B>Question 1143050</B>
A jet airplane departing on time, flying between two airports at an average speed of 540 mph
arrives eight minutes late. Departing on time and flying at an average speed of 480 mph it
arrives fifty-three minutes late. What is the number of miles between the two airports?
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d = distance
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A jet airplane departing on time, flying between two airports at an average speed of 540 mph arrives eight minutes late.
t1 = time at 540 mi/hr
t1 = d/540
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Departing on time and flying at an average speed of 480 mph it arrives fifty-three minutes late.
t2 = time at 480 mi/hr
t2 = d/480
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t2 = t1 + 0.75  ----- time in hours
d/480 = d/540 + 0.75
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Solve for d.
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