A train running at a speed 360 km/hr passes a platform with double length in 30 sec. Find the length of platform.
Answer & explanation
Correct answer: option 2
Speed of train = 360 km/hr = 360 × \(\frac{5}{18}\) m/sec = 100 m/sec
Time = 30 sec
Let length of train = T
Then length of platform = 2 × T
Total distance traveled by train to pass the platform = T + (2 × T)
Distance = Speed × Time
⇒ T + (2 × T) = 100 × 30
⇒ 3T = 3000
⇒ T = 1000m or 1km
Length of platform = 2 × T = 2 × 1= 2 km.