Home
Class 12
PHYSICS
Two trains one of length l(1)=630m and o...

Two trains one of length `l_(1)=630m` and other of length `l_(2)=120m` move uniformly in two parallel paths in opposite direction with speed `mu_(1)=48 km//h`and `mu_(2)=102 km//h` respectively.

A

The relative speed of trains is `54 km//hr`.

B

The relative speed of trains is `50km//hr`

C

Time taken by one train to completely pass another is `15 s`.

D

Time taken by one train to completely pass another is `18 s`.

Text Solution

Verified by Experts

The correct Answer is:
D

`V_(rel)=102+48=150 (km)//hr=150xx(5)/(18)m//s`
and `i_(rel)=v_(rel)xxt`
`rArr750=150xx(5)/(18)t:.t=18 s`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Two trains of length 110 m and 90 m are running on parallel lines in the same direction with a speed of 45 km/h and 50km/h respectively . In what time will they pass other ?

Two trains of length 190 m and 210 m respectively, are running in opposite directions on parallel tracks. If their speeds are 40 km/hr and 32 km/hr respectively in what time will they cross each other?

Two trains of length 150 m and 300 m long are going parallel in opposite direction at a speed of 90 m/min and 60 m/min respectively. What is the time taken for the trains to cross each other completely ?

The length of Lucknow mail is 120 m and that of Punjab mail is 80 m. These two trains are running in the opposite direction with velocities of 40 km/h and 50 km/h respectively. The time taken by them to cross each other is :

The length of Lucknow mail is 120 m and that of Punjab mail is 80 m These two trains are runing in the opposite direction with velocities of 40 km/h and 50 km/h respectively.The time taken by them to cross each other is:

Two trains, 230m and 270m long, are running on parallel tracks in the oppoite directions at a speed of 40km/h and 50 km/h, respectively. What is the time taken by the trains to cross each other completely?

A train of length 120 m travels at a speed of 57 km/h. In what time it will pass a man who is walking at 3 km/h in the opposite direction?

Two trains having lengths 120 m and 100 m running in the opposite directions with velocities 40 km/h and 50 km/h. In what time they will completely cross each other?