Physics, 07.10.2021 20:10 amllamas4972
A train travelled from city a to city b. For the first 14hours, it travelled at an average speed of 120km/h. For the 10 hours, it travelled at an average speed of 90km/h. What was the average speed of the whole journey?km/h
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A train travelled from city a to city b. For the first 14hours, it travelled at an average speed of...
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