A train running at a speed of 45 km/h crosses a 100 m long platform in 60 seconds. The time taken by the train to cross an electric pole is:
Answer & explanation
Correct answer: option 1
Speed = 45 km/h
= 45 × \(\frac{5}{18}\) m/sec
= 5 × \(\frac{5}{2}\) m/sec
= \(\frac{25}{2}\) m/sec
Time = 60 seconds
Distance = Speed × Time
= \(\frac{25}{2}\) × 60
= 750
Trains length = 750 - 100
= 650
Time taken = \(\frac{650 × 2 }{ 25 }\)
= 52
The correct answer is Option (1) → 52 seconds