Multiple choice

A 200 m long train moving at the speed of 75 m/sec. crosses another 240 m long train coming from opposite direction in 4.4 seconds. What is the speed of second train?

  1. 21 m/sec

  2. 23 m/sec

  3. 25 m/sec

  4. 28 m/sec

  5. 30 m/sec
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The second train's speed is 25 m/sec. When trains move in opposite directions, their relative speed is (v1 + v2). Total distance = 200 + 240 = 440 m. Time = 4.4 sec. So (75 + v2) = 440/4.4 = 100 m/sec. Therefore v2 = 25 m/sec.

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