A train 150 meters long passing a platform 250 meters long takes 20 seconds. Find the speed of the train in km/h. MCQ with Answer and Explanation

Explanation:
Time = 4 minutes = 240 seconds. Speed = 1200 / 240 = 5 m/s. Converting to km/h = 5 * (18/5) = 18 km/h.

Explanation:
Speed = 300 / 20 = 15 m/s. In km/h = 15 * (18/5) = 54 km/h.

Explanation:
Let car speed be c, then train speed is 1.2c. Time difference = 120/c - 120/(1.2c) = 10/60 hour = 1/6 hour. 120/c * (1 - 1/1.2) = 1/6 => 120/c * (0.2/1.2) = 1/6 => 120/c * (1/6) = 1/6 => c = 120 km/h.