- A42
- B50
- C45
- D40
Step-by-Step Solution
For equal distances, average speed = km/h (not the simple mean 50).
Answer: A) 42
A milk tanker runs from a dairy to a chilling plant at 30 km/h and comes back empty on the same road at 70 km/h. What is its average speed for the whole trip, in km/h?
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