Multiple choice

A train crosses a pole in 25 seconds and a 100 metres plateform in 35 seconds. The length of the train is

  1. 150 m

  2. 200 m

  3. 250 m

  4. 175 m

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

Train length L. Crossing a pole: L/25 = speed. Crossing 100m platform: (L + 100)/35 = speed. Equating: L/25 = (L + 100)/35. Cross-multiply: 35L = 25L + 2500, so 10L = 2500, L = 250m.