Physics, 25.08.2020 01:01 xsong39481

A submarine completed a 450 km training with an average speed of 50 km/h. For the first 180 km, it travelled at an average speed of 60 km/h. What was the average speed for the remaining distance? Km/h

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A submarine completed a 450 km training with an average speed of 50 km/h. For the first 180 km, it t...

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