- A43.33 km/h
- B45 km/h
- C42 km/h
- D40 km/h
Step-by-Step Solution
Equal distances → harmonic mean: km/h. (43.33 is the arithmetic mean.)
Answer: D) 40 km/h
A car covers three equal stretches of a highway at 30 km/h, 40 km/h and 60 km/h. What is its average speed over the whole distance?
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