Question

18. Two planes left an airport at the same time. One flew north at a set speed and the other

flew south at one-and-a-half times the speed of the other plane. Three hours later the planes

were 2400 miles apart. How fast was each plane flying?

Answer 1

Answer: plane A = 333.33mph

Plane B = 500mph

Step-by-step explanation:

Given data:

Distance between the two planes = 2400miles.

Plane A flew North

Plane B flew south

Solution:

Let v represent plane A.

Let 2v represent plane B.

Distance between the two plane

v + 1.5* v = 3*v

7.5v = 2500miles

v = 333.33mph

Plane B has one and half times the speed of plane A

= 1.5 * 333.33

= 500mph