A train running at a speed of 150 km/hr crosses a 300 m long platform in 30 seconds. What is the length of the train in metres?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 950 m
To cross a platform, the train must cover its own length plus the length of the platform. The speed is changed to m/s first, since the time is in seconds (multiply km/hr by \(\frac{5}{18}\)).
Speed: \(\displaystyle150\times\frac{5}{18}=\frac{125}{3}\) m/s
Distance covered in 30 s: \(\displaystyle\frac{125}{3}\times30=1250\) m
Length of the train: \(1250-300=950\) m