A man walks at 5 km/h for 2 hours and then runs at 10 km/h for 1 hour. What is his average speed?
A6.67 km/h
B7.5 km/h
C8.0 km/h
D8.33 km/h
Explanation
Total distance = (5 * 2) + (10 * 1) = 10 + 10 = 20 km. Total time = 2 + 1 = 3 hours. Average speed = 20 / 3 = 6.67 km/h.
Exam Relevance
- Topic: Speed, Time & Distance
- Subtopic: Average Speed
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