A cyclist rides to a village at 30 km/h and returns by the same road at 45 km/h. What is the average speed for the whole trip?
Answer and explanation
Correct answer: C. 36 km/h
- Step 1: For a distance each way the total time is , so the average speed is divided by that time, km/h. Answer: 36 km/h. Why not the others: 37.5 km/h, 13 km/h and 15 km/h don't fit.
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