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Two trains of same length take 6 s and 9...

Two trains of same length take 6 s and 9 s,respectively to cross a pole .If both the trains are running in the same direction, then how long will they take to cross each other?

A

a. 30s

B

b. 36s

C

c. 40s

D

d. 42 s

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The correct Answer is:
B
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