Question 46134
Let the speed be x
EQUATION:
{{{480/x-560/x=1}}}
560x-480x=(x)(x)
{{{x^2-80x}}}
x=80
Speed of the plane --> 80mph
Second portion 480 miles
TIme = Distance / speed
--> 480/80
--> 6
Hence, it took 6 hours to fly through the second part of the trip.
Paul.