A train passes a static post in 12 seconds. If the speed of the train is 60 km/h, what is the length of the train? MCQ with Answer and Explanation

Explanation:
Circumference of the wheel = 2 * (22/7) * 42 = 264 cm = 2.64 meters. Total distance = 132 meters. Number of revolutions = 132 / 2.64 = 50 revolutions.

Explanation:
Let each third segment distance be 40 km. Total sector distance = 120 km. Total time = 40/20 + 40/40 + 40/40 = 2 + 1 + 1 = 4 hours. Average speed across route = 120 / 4 = 30 km/h.

Explanation:
Total distance = 360 + 240 = 600 km. Time for first part = 360 / 45 = 8 hours. Time for second part = 240 / 60 = 4 hours. Total time = 8 + 4 = 12 hours. Average speed = 600 / 12 = 50 km/h.