Question 363412
D=RT
2,400=(X+2X)4
2,400=3X*4
2,400=12X
12X=2,400
X=2,400/12
X=200 MP FOR THE SLOWER PLANE.
2*200=400 MPH FOR THE FASTER PLANE.
PROOF:
2,400=(200+400)4
2,400=600*4
2,400=2,400