A train travels with a speed of 20 m/s in the first 10 minutes, goes 8.5 kms in the next 10 minutes, 11 kms in the next 10 minutes, 8.5 kms in the next 10 minutes and 6 kms in the next 10 minutes. What is the average speed of the train in km per hour for the journey described?

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A train travels with a speed of 20 m/s in the first 10 minutes, goes 8.5 kms in the next 10 minutes, 11 kms in the next 10 minutes, 8.5 kms in the next 10 minutes and 6 kms in the next 10 minutes. What is the average speed of the train in km per hour for the journey described?






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