Time, Speed & Distance · Question 11 · Medium
A bike covers the first 100 km at 50 km/h and the next 150 km at 75 km/h. What is the average speed for the whole journey?
- 62.5 km/h
- 62 km/h
- 60 km/h
- 65 km/h
Answer and explanation
Answer: A. 62.5 km/h
Explanation: Time = 100/50 + 150/75 = 2 + 2 = 4 hours. Average speed = 250 ÷ 4 = 62.5 km/h.
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