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The length of Lucknow mail is 120 m and ...

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:

A

8 s

B

72 s

C

12.5 s

D

none of these

Text Solution

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The correct Answer is:
A
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