Multiple choice

A 220m long train crosses another 320m long train coming from opposite direction in 18 seconds . If the speed of the first train is 65 km/hr . What is the speed of another train .

  1. 43 km/hr

  2. 53 km/hr

  3. 63 km/hr

  4. 47 km/hr

  5. None of these
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A Correct answer
Explanation

When trains cross from opposite directions, relative speed = sum of individual speeds. Total distance covered = 220 + 320 = 540 m. Time = 18 seconds. Relative speed = 540/18 = 30 m/s = 108 km/hr. Speed of second train = 108 - 65 = 43 km/hr. This uses the relative speed concept for objects moving in opposite directions.

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