A train running at a speed of 360 km/hr passes a platform of double its length in 30 sec. Find the length of the platform.
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 2 km
To pass a platform, a train must cover its own length plus the length of the platform. The platform is twice the train, so the distance covered is three times the train’s length.
Speed \(\displaystyle =360\times\frac{5}{18}=100\) m/s
Distance in 30 s \(=100\times30=3000\) m
Train \(=L\), platform \(=2L\): \(3L=3000\), so \(L=1000\) m
Platform \(=2L=2000\) m \(=2\) km