- A62 km/h
- B58 km/h
- C65 km/h
- D60 km/h
Step-by-Step Solution
Times: 2 h, 2 h, 2 h. Total 360 km in 6 h → 60 km/h. (The mean of the three speeds also happens to be 60, but only because each leg takes 2 h.)
Answer: D) 60 km/h
A train runs 120 km at 60 km/h, then 150 km at 75 km/h, and finally 90 km at 45 km/h. What is its average speed for the whole run?
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