A person travels from city A to city B at 50 km/h and returns at 70 km/h. What is his average speed for the round trip? MCQ with Answer and Explanation

Explanation:
Time = 2 minutes = 120 seconds. Speed = 600 / 120 = 5 m/s. In km/h = 5 * (18/5) = 18 km/h.

Explanation:
Speed of the second locomotive = 480 / 4 = 120 km/h. Ratio is 5:6, so 6 parts = 120 km/h => 1 part = 20 km/h. Speed of the first locomotive = 5 parts = 5 * 20 = 100 km/h.

Explanation:
Distance covered = Speed * Time = 340 * 25 = 8500 meters = 8.5 km.