A train 900 m long is running at 108 km/h. How long will it take to clear a 900 m long platform completely?

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SSC CGL 2023 Tier-I Official Paper (Held On: 14 Jul 2023 Shift 1)
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  1. 60 s
  2. 45 s
  3. 30 s
  4. 18 s

Answer (Detailed Solution Below)

Option 1 : 60 s
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Detailed Solution

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Given:

Speed of train = 108 km/hr

Length of train = 900 meters

Length of platform = 900 meters

Formula Used:

Time = Distance/Speed

Calculation:

Speed of train in km/hr = 108 km/hr

Speed of train in m/sec = 108 × 5/18

⇒ 30 m/sec

Time taken by train to cross the platform:

As we know,

Time = Distance/Speed

⇒ (900 + 900)/30

⇒ 1800/30

⇒ 60 sec

∴ The train will cross the platform in 60 seconds.

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