How long is a train 240 m long running at the rate of 54 km/h to cross a bridge 135 m in length?

16.

If I walk at 5 km/h, I miss a train by 7 min. If, however, I walk at 6 km/h, I reach the station 5 min before the departure of the train. The distance (in km) between my house and the station is

A.

6

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Correct Answer:

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The speed of the train = 54 kmph = \( \Large 54 \times \frac{5}{18} = 15 mts./sec \)Sum of the length of the train and the platform = 360+240 = 600 mts.Time taken to pass the platform = Time taken to cover 600 mts.

at the speed of 15 m/sec.= \( \Large \frac{600}{15} \) = 40 seconds

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