
Patrick B. answered 02/04/21
Math and computer tutor/teacher
R is the speed of the slower train...
R+20 is the speed of the fast train
5(R+20)+5R = 450
5R +100 + 5R = 450
10R + 100 = 450
10R = 350
R = 35
slower train has traveled 35*5=175
fast train traveled 55*5 275