Question

two airliners are 1600 miles apart and heading towards eachother at different altitudes. the first plane is traveling north at 620 miles per hour, while the second is traveling south at 780 miles per hour. when will the planes pass each other

Answer 1

1600 divided by 620 = 2.5 hours

1600 divided by 780 = 2 hours and 5 minutes

That's all the easy steps... now you have to do the rest :3 I hope this help you