A train travelling at constant speed cro...

A train travelling at constant speed crosses two person walking in the same direction in 8 seconds and 8.4 seconds respectively . The first person was walking at the speed of 4.5 km /hr while the second was walking at the speed of 6 km/hr . What was the speed of the train in km/hr ?

A

42

B

32

C

36

D

40

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The correct Answer is:

C

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