A cyclist covers 500 meters in 2 minutes. What is his speed in km/h? MCQ with Answer and Explanation

Explanation:
Circumference of circular path = 2 * (22/7) * 70 = 440 meters. Speed = 440 / 44 = 10 m/s. In km/h = 10 * (18/5) = 36 km/h.

Explanation:
Let total distance be 100 km. First section = 30 km; Time = 30 / 30 = 1 hour. Second section = 70 km; Time = 70 / 42 = 5/3 hours. Total time = 1 + 5/3 = 8/3 hours. Average speed = 100 / (8/3) = 300 / 8 = 37.5 km/h.

Explanation:
Downstream speed = 8 + 4 = 12 km/h. Time = 45 minutes = 45/60 = 3/4 hour. Distance covered = Speed * Time = 12 * (3/4) = 9 km.