Question 121398
560/(X+1)=480/X
560X=480(X+1)
560X=480X+480
560X-480X=480
80X=480
X=480/80
X=6 HOURS FOR THE SECOND 480 MILE TRIP.
6+1=7 HOURS FOR THE FIRST 560 MILE TRIP.
PROOF
560/7=480/6
80=80