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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 ______.
Options
`11/5`
`5/2`
`3/2`
`25/11`
Solution
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`
