Question

A passenger train of length 60 m travels at a speed of 80 km/ hr. Another freight train of length 120 m travels at a speed of 30 km/h. The ratio of times taken by the passenger train to completely cross the freight train when: (i) they are moving in same direction, and (ii) in the opposite directions is ______.

विकल्प

• `11/5`

• `5/2`

• `3/2`

• `25/11`

Answer 1

A passenger train of length 60 m travels at a speed of 80 km/ hr. Another freight train of length 120 m travels at a speed of 30 km/h. The ratio of times taken by the passenger train to completely cross the freight train when: (i) they are moving in same direction, and (ii) in the opposite directions is `bb(11/5)`.

Explanation:

t₁ = `((60+120)//1000  "km")/(80-30)`

t₂ = `((60+120)//1000  "km")/(80+30)` 

∴ `"t"_1/"t"_2 = 11/5`