Excluding stoppages, a truck travels at 90 km/h and including stoppages it travels at 75 km/h. How many minutes does the truck stop per hour? MCQ with Answer and Explanation

Explanation:
Total distance = 10 + 12 = 22 km. Total time taken = 10/12 + 12/10 = 5/6 + 6/5 = (25 + 36) / 30 = 61 / 30 hours. Average speed = 22 / (61/30) = 660 / 61 = 10.82 hours (approx 10.83 km/h).

Explanation:
Speed of train = 60 * (5/18) = 50/3 m/s. Length of train = Speed * Time = (50/3) * 12 = 200 meters.

Explanation:
Time difference = 10 - (-2) = 12 minutes = 12/60 = 0.2 hours. Let distance be d. d/4 - d/5 = 0.2 => d/20 = 0.2 => d = 4 km.