Question

Two locomotives approach each other on parallel tracks. Each has a speed of v = 80 km/h with respect to the ground. If they are initially d = 9.0 km apart, how long will it be before they reach each other?(min)

Answer 1

Step-by-step explanation:

Given

speed of locomotive
`v=80\ km/h`

distance
`d=9\ km`

Relative velocity of two locomotive
`v_r=80-(-80)=160\ km/h`

Time taken
`=(distance)/(speed)`

`t=(9)/(160) \hr`

`t=(9)/(160)* 60\ min`

`t=3.375\ min`