The length of Kanpur mail is 120 m and that of Punjab mail is 80 m. These two trains are running in the same direction with speeds of 40 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 running in the same 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 same 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 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 of lengths 100 m and 150 m are travelling in opposite directions at speeds of 75 kmph and 50 kmph respectively. What is the time taken by them to cross each other?

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?