Question

A train crosses a platform 100 metres long in 60 seconds at a speed of 45 km/hr. The time taken by the train to cross an electric pole is:

• A. 8 seconds
• B. 1 minute
• C. 52 seconds
• D. Data inadequate

Hint:

When crossing a pole, only train length matters. When crossing a platform, total length = train length + platform length.

Answer 1

The Correct Option is C

Speed = \(45 \, \text{km/h} = 12.5 \, \text{m/s}\). When crossing platform: Length of train + 100 = \(12.5 \times 60 = 750 \, \text{m}\) ⇒ Length of train = 650 m. Time to cross pole = \( \frac{650}{12.5} = 52 \, \text{s} \).