11- A train travels a speed of 60 km-h 0-52 h- 30 km-hr the next 0-24 and then 70 km-h the next 0-71 h- What is the average speed of the train-

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11) A train travels at a speed of 60 km/h for 0.52 h, at 30 km/hr for the next 0.24 and then at 70 km/h for the next 0.71 h. What is the average speed of the train?

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