The length of a brigade which a train 130 m long and traveling at 45kmph can cross in 30 seconds, is

196 mts
220 mts
230 mts
245 mts

Correct Answer: 245 mts

Explanation:

Let the length of the brigade is x mts
Then Distance = 130 + x mts
given speed = 45 kmph = 45 x5/18 m/s
Time = 30 sec
T = D/S
=> 30 = 130+x/(45x5/18)
=> x = 245 mts.

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