A train 150 metres long is moving at a speed of 54 km/hr. How much time will it take to completely pass a pole?

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AAI Junior Assistant (Fire Service) Official Paper (Held On: 21 Apr, 2025 Shift 1)
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  1. 16 seconds
  2. 10 seconds
  3. 20 seconds
  4. 8 seconds 

Answer (Detailed Solution Below)

Option 2 : 10 seconds
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Detailed Solution

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Given:

Length of train (L) = 150 m

Speed of train (S) = 54 km/hr

Formula used:

Time (T) = Distance ÷ Speed

Note: Speed needs to be converted from km/hr to m/s.

Calculation:

Speed in m/s = 54 × (1000 ÷ 3600)

⇒ Speed = 15 m/s

Time = 150 ÷ 15

⇒ Time = 10 seconds

∴ The correct answer is option (2).

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