A train 110 m long passes a telegraph pole in 3 seconds. How much time will it take to cross a railway platform 165 m long?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 7.5 seconds
Passing a pole, the train covers only its own length; crossing a platform, it covers its length plus the platform.
Speed of the train \(\displaystyle =\frac{110}{3}\) m/s
Distance to cross the platform \(=110+165=275\) m
Time \(\displaystyle =275\div\frac{110}{3}=\frac{275\times3}{110}=7.5\) s