A train passes a standing track worker in 12 seconds and crosses a platform 200 meters long in 22 seconds. Find the length of the train. MCQ with Answer and Explanation

Explanation:
Relative speed = 60 - 12 = 48 km/h = 48 * (5/18) = 40/3 m/s. Length of train = Relative speed * Time = (40/3) * 12 = 160 meters.

Explanation:
Circumference = 2 * (22/7) * 140 = 880 meters. Time taken = Distance / Speed = 880 / 5 = 176 seconds.

Explanation:
Ratio of speeds = 3:4, so ratio of times taken = 4:3. Given 4 parts = 36 seconds => 1 part = 9 seconds. Time taken by the second runner = 3 parts = 3 * 9 = 27 seconds.