Multiple choice

Two trains are moving in the same direction at 75 km./h. and 48 km./h. The faster train crosses a man sitting in the slower in 14 seconds.Find the length of the faster train.

  1. 86 m.

  2. 105 m.

  3. 185 m.

  4. 210 m.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When trains move in the same direction, relative speed = difference of speeds. Here: (75-48) = 27 km/h = 27 × (5/18) = 7.5 m/s. In 14 seconds, distance covered = 7.5 × 14 = 105 m, which is the faster train's length. Options A (86 m), C (185 m), and D (210 m) are incorrect calculations.

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