Question 716245
D=RT
1444.5=(4X-X)4.5
1444.5=3X*4.5
1444.5=13.5X
X=1444.5/13.5
X=107 MPH. FOR THE SLOWER PLANE.
4*107=428 MPH. FOR THE FASTER PLANE,
PROOF:
1444.5=(428-107)*4.5
1444.5=321*4.5
1444.5=1444.5