Multiple choice

The distance between two stations A and B is 200 km. A train runs from A to B at a speed of 75 km/hr, while another train runs from B to A at a speed of 85 km/hr. What will be the distance (in km) between the two trains 3 minutes before they meet?

  1. 5

  2. 8

  3. 10

  4. 6
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Relative speed = 75 + 85 = 160 km/hr. In 3 minutes (3/60 = 1/20 hour), distance covered = 160 × 1/20 = 8 km. This is the distance between trains 3 minutes before meeting, regardless of starting distance. The trick is recognizing that the distance covered in 3 minutes IS the gap.

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