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Two trains 121 meters and 99 meters in l...

Two trains 121 meters and 99 meters in length respectively are running in opposite directions, one at the rate of 40 kms and the other at the rate of 32 kms an hour. In what time will they completely clear each other from the movement they meet ?

A

10 seconds

B

9 seconds

C

11 seconds

D

None of the above

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