Question

An airplane flies constant speed of 720 miles per hour. How long will it take to travel a distance of 1800 miles?

Answer 1

720/1 = 1800/x.....720 miles to 1 hr = 1800 miles to x hrs
cross multiply
(720)(x) = (1)(1800)
720x = 1800
x = 1800/720
x = 2.5 (or 2 1/2) hrs <==

Answer 2

It will take 2 hours and 30 minutes because divide 720 miles from 1800 miles