So if you go 720 miles in 8 hours, you would travel at a speed of:
720 miles / 8 hours = 90 miles per hour.
So in 1 hour, you would have traveled:
90 miles per hour * 1 hour = 90 miles.
(The gallons is irrelevant to the problem)
720 in 8 hours the ratio is 720 to 8 or 720:8 this can be like fraction as 720/8 simplify it since 8=hours and you want 1 hour 720/8=360/4=180/2=90/1 90 mles in 1 hour on 4 gallons
