- A50 km/h
- B58.3 km/h
- C68.75 km/h
- D55 km/h
Step-by-Step Solution
Take the route as 4 km: time h. Average km/h. (68.75 weights the speeds by distance.)
Answer: A) 50 km/h
A train covers the first quarter of its route at 50 km/h, the next half at 100 km/h and the last quarter at 25 km/h. What is its average speed?
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