A train 200 m long passes a platform 400 m long in 40 seconds. How much time will the same train take to pass a platform 250 m long?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 30 seconds
To pass a platform the train covers its own length plus the platform's length. The first platform gives the speed; the speed is the same for the second.
Distance for the first platform \(=200+400=600\) m
Speed \(\displaystyle =\frac{600}{40}=15\) m/s
Distance for the second platform \(=200+250=450\) m
Time \(\displaystyle =\frac{450}{15}=30\) seconds