Multiple choice

A train 300 m. long is running with a speed of 54 kmph. In what time will it cross a telephone pole? एक 300 मी. लम्बी ट्रेन 54 किमी./घंटा की चाल से चल रही है | कितने समय में यह एक टेलीफोन के खम्भे को पार कर लेगी ?

  1. 20 seconds/सेकेण्ड

  2. 15 seconds/सेकेण्ड

  3. 17 seconds/सेकेण्ड

  4. 18 seconds/सेकेण्ड

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A Correct answer
Explanation

Train length = 300 m, Speed = 54 kmph. Convert speed to m/s: 54 × 5/18 = 15 m/s. Time to cross a pole = Length/Speed = 300/15 = 20 seconds. The train needs to travel its own length to completely cross the pole.