two cities are 4050 miles apart. a plane leaves one of them, traveling towards the other at an average speed of 420 miles per hour. At the same time a plane leaves the other city, traveling towards the first, at an average speed of 390 miles per hour. How long will it take them to meet?

Question

anonymous · Answer

help!!

anonymous · Answer

They are moving together with a speed of (420+390)mph

anonymous · Answer

so the meet in how many hours?

anonymous · Answer

Time = distance/speed = 4050/(420+390) = ...