A train 150 m long takes 20 seconds to cross a platform 450 m long. What is the speed of the train (in m/s)?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 30
To cross a platform, a train covers its own length plus the length of the platform.
Distance covered \(=150+450=600\) m
Speed \(\displaystyle =\frac{600}{20}=30\) m/s