A vehicle travels from City A to City B at 60 km/h and returns along the same route at 40 km/h. What is the average speed of the vehicle for the round trip?
Answer and explanation
Correct answer: D. 48 km/h
- Step 1: Average speed for equal distance round trip: . Step 2. . Answer: 48 km/h. Why not the others: 50 km/h is simple arithmetic mean (incorrect because time spent at 40 km/h is greater); 45 and 52 are calculation errors.
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