Two planes leave an airport at the same​ time, one flying​ east, the other flying west. The eastbound plane travels 150 mph slower. They are 1700 mi apart after 2 hr. Find the speed of each plane.

Answer 1

R is the speed of the faster plane.

2R + 2(R-150) = 1700

2R + 2R - 300 = 1700

4R - 300 = 1700

4R = 2000

R=500

The faster plane speed is 500.

The slower plane speed is 350.