Selam N. answered • 03/27/18

Tutor

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Experienced Educator with Masters Degree (in area of expertise)

Speed = distance/time; also, this can be expressed for d, as distance = speed(time).

*Train 2: d = 60t*However, Train 1 had already travelled 1 hour more so its time is (t +1) and it is traveling only the remaining distance, (250- d)

*Train 1: 250 -d = 70(t +1)*Rewrite this equation,

*250 -d = 70t + 70*

*-d = 70t +70 - 250*

*-(-d = -180 + 70t)*

*d = 180 -70t*Write the equations, equal to each other:

60t = 180 - 70t

t = 18/13

The time it took for Train 2 to cross is

**after 10 am and f***1.385 hr*or Train 1, it is (1 + 1.385)hr=

*2.385 hr*

*The distance from City 2 is therefore,*

*d= 60 (18/13)*

*d = 83.08 miles*