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Two trains A & B are travelling in the s...

Two trains A & B are travelling in the same direction at a certain speed. Length of the train A is 300 metres and the speed of the train B is 30km/hr. The train A passes a man who is walking at a speed of 4km/hr along the line in the same direction as 'A' in 30 seconds.
If the train A passes the train B completely in 5.4 minutes find the length of the train B in metres?

A

A)500m

B

B)750m

C

C)600m

D

D)850m

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