SOLUTION: A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, wh

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Question 61518: A plane took 1 hour longer to travel 560 miles on the first portion of a flight than it took to fly 480 miles on the second portion. If the speed was the same for each portion, what was the flying time for the second part of the trip?
Thanks for your help!
CH
Answer by asha(30) About Me  (Show Source):
You can put this solution on YOUR website!
let the flying time of the plane be x m.p.h.
we know that distance /speed = time
the plane travels 560 miles in the first part of the journey
the plane travels 480 miles in the second part of the trip the plane takes one hour longer for the the 1st part of the journey
we have 560/x - 480/x=1
multiplying both sides by x we get
560 -480 =x
x = 560 -480
80
speed of the plane is 80 m.p.h.
time taken for the 2nd portion of the trip is
480/80
=6 hours
the answer is 6 hrs.
good luck !!!