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A train of length 150 m takes 10 s to cr...

A train of length 150 m takes 10 s to cross another train 100 m long coming from the opposite direction. If the speed of first train is 30 kmph, what is the speed of second train ?

A

54 km/hr.

B

60 km/hr.

C

72 km/hr.

D

36 km/hr.

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The correct Answer is:
B
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