easy · GMAT Quantitative Reasoning
A marathon runner completes the first 6 km of a course at a speed of 12 km/h and the next 4 km at a speed of 8 km/h.
What is the average speed of the runner for the entire 10 km?
- 10.5 km/h
- 20 km/h
- 11 km/h
- 10 km/h
- 9.6 km/h
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