Multiple choice

Two trains cross each other at a speed of 70 KMPH and 50 KMPH respectively. if the total length of both the trains is 1500 m find the time in which they cross each other the trains were moving in opposite direction?

  1. 43 second

  2. 41 second

  3. 45 second

  4. 49 second

  5. 42 second
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Relative speed = 70 + 50 = 120 kmph. Convert to m/s: 120 * 5/18 = 100/3 m/s. Time = Distance / Speed = 1500 / (100/3) = 1500 * 3 / 100 = 45 seconds.

AI explanation

When two trains move in opposite directions, their relative speed is the sum of their speeds, so 70 plus 50 equals 120 kmph. Converting this to m/s gives 120 multiplied by 5/18, which equals 100/3 m/s. The time taken to cross is the total distance divided by the relative speed, so 1500 divided by 100/3 gives 45 seconds.

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