Multiple choice

If a train of length 550 m long is running at the speed of 72 km/h, crosses a bridge in 1 minute 25 second, then what is the length of the bridge? यदि एक 550 मी. लम्बी ट्रेन 72 किमी/घंटे की चाल से चलते हुए, एक पुल को 1 मिनट 25 सेकंड में पार करती है, तो पुल की लम्बाई कितनी है?

  1. 950 m

  2. 1150 m

  3. 1250 m

  4. 1050 m
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Speed = 72 km/h = 72 × (5/18) = 20 m/s. Time = 1 minute 25 seconds = 85 seconds. Total distance covered = speed × time = 20 × 85 = 1700 m. This distance equals train length + bridge length. So bridge length = 1700 - 550 = 1150 m. Standard train-distance problem.

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