How long does a 120 m long train take to pass a stationary man if it travels at a speed of 36 km - hr -A- 12 secondsB- 14 secondsC- 16 secondsD- 1 - 5 minutes

The correct options are A 12 seconds D 1/5 minutes Speed of the train = 36 km/hr = 5/18× 18 = 10 m/s We know that, Speed = Distance/Time⇒ Time = Distance/Speed ...

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Standard VII

Physics

Speed (Average Speed)

How long does...

Question

How long does a 120 m long train take to pass a stationary man if it travels at a speed of 36 km/hr?

12 seconds

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14 seconds

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16 seconds

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1/5 minutes

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Solution

The correct options are
A
12 seconds

D
1/5 minutes

Speed of the train = 36 km/hr = $\frac{5}{18} \times 18$ = 10 m/s

We know that, Speed = $\frac{D i s t a n c e}{T i m e} \Rightarrow T i m e = \frac{D i s t a n c e}{S p e e d}$
The train needs to cover it's own length in order to cross the man which is 120 m

Therefore, time taken = $\frac{120}{10}$ = 12 seconds

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How long does a 120 m long train take to pass a stationary man if it travels at a speed of 36 km/hr?

The correct options are A 12 seconds D 1/5 minutes Speed of the train = 36 km/hr = 518×18 = 10 m/s We know that, Speed = DistanceTime⇒Time=DistanceSpeed The train needs to cover it's own length in order to cross the man which is 120 m Therefore, time taken = 12010 = 12 seconds