A cyclist covers 40 km at 20 km/h and another 40 km at 10 km/h. What is the average speed for the whole journey?
A13.33 km/h
B15 km/h
C16 km/h
D17.5 km/h
Explanation
Total Distance = 80 km. Total Time = 40/20 + 40/10 = 2 + 4 = 6 hours. Average Speed = 80 / 6 = 13.33 km/h.
Exam Relevance
- Topic: Age Problems, Time & Distance, Work
- Subtopic: Average Speed
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