Multiple choice

A train travelling at a speed of 65 km/h crosses a man travelling with a speed of 7 km/h in an opposite direction in 6.5 seconds. What is the length of the train?

  1. 115 m

  2. 130 m

  3. 135 m

  4. 140 m

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Relative speed when moving in opposite directions = 65 + 7 = 72 km/h. Convert to m/s: 72 × (5/18) = 20 m/s. Time = 6.5 seconds. Length = Speed × Time = 20 × 6.5 = 130 meters. Opposite direction speeds add up.