SOLUTION: A small airplane flies 945 miles with an average speed of 270 miles per hour.1.75 hours after the plane leaves, a Boeing 747 leaves from the same point. Both planes arrive at the s

Question 1055077: A small airplane flies 945 miles with an average speed of 270 miles per hour.1.75 hours after the plane leaves, a Boeing 747 leaves from the same point. Both planes arrive at the same time; what was the average speed of the 747?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
What is the head start of the small plane in miles?

mi
-----------------------
Start a stopwatch when the 747 leaves. Let =
the time in hrs on the stopwatch when both planes
arrive at the destination.
Let = the average speed of the 747 in mi/hr
-----------------------
Equation for the small plane:
(1)
Equation for the 747:
(2)
-----------------------------
(1)
(1)
Plug this value into (2)
(2)
(2)
The average speed of the 747 was 540 mi/hr

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