A train 120 m long passes a telegraph pole in 6 seconds. How much time will it take to cross a railway platform 180 m long?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 15 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 \(\displaystyle =\frac{120}{6}=20\) m/s
Distance to cross the platform \(=120+180=300\) m
Time \(\displaystyle =\frac{300}{20}=15\) s