A civilian covers a 2400-meter long walkway in exactly 8 minutes. Find his moving speed in km/h. MCQ with Answer and Explanation

Explanation:
Speed of train = 72 * (5/18) = 20 m/s. Total distance = 140 + 220 = 360 meters. Time taken = 360 / 20 = 18 seconds.

Explanation:
New speed = 5/7 of usual speed => New time = 7/5 of usual time. Difference = 2/5 of usual time = 24 minutes. 1/5 of usual time = 12 minutes => Usual time = 60 minutes.

Explanation:
Total distance covered = 3 * 8 = 24 km. Total time taken = 8/12 + 8/24 + 8/24 = 2/3 + 1/3 + 1/3 = 4/3 hours. Average speed = 24 / (4/3) = 24 * 3 / 4 = 6 * 3 = 18 km/h.