Question

. Two planes are 1620 miles apart and are traveling toward each other. One plane is traveling 120 mph

faster than the other plane. The planes meet in 1.5 hours. Find the speed of each plane.

Answer 1

Explanation:

let the speed of one plane=x mph

speed of other plane=x+120 mph

x×1.5+(x+120)×1.5=1620

(x+x+120)×1.5=1620

(2x+120)×1.5=1620

3x+180=1620

3x=1620-180

3x=1440

x=480

speed of one plane=480 mph

speed of second plane=480+120=600 mph