A passenger coach locomotive 200 meters long passes a clear roadside post marker in 10 seconds flat. Find the time needed to cross an extensions platform 440 meters long. MCQ with Answer and Explanation
A passenger coach locomotive 200 meters long passes a clear roadside post marker in 10 seconds flat. Find the time needed to cross an extensions platform 440 meters long.
A. 40 seconds
B. 28 seconds
C. 36 seconds
D. 32 seconds
Answer: Option D
Solution (By JKSSB Mock Tests)
Speed of coach locomotive = 200 / 10 = 20 m/s. Total distance to clear platform stretch = 200 + 440 = 640 meters. Time required = 640 / 20 = 32 seconds.
Explanation:
Relative speed = 300 / 25 = 12 m/s = 12 * (18/5) = 43.2 km/h. Since they move in opposite directions, Relative Speed = Speed of train + Speed of worker => 43.2 = Speed of train + 6 => Speed of train = 37.2 km/h.
A train 120 meters long passes an active crossing signal point in 6 seconds flat. Find the time interval needed to clear a station platform 240 meters long.
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