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Mathematics, 26.08.2019 00:20 zachtheskier3896

Atest driver has to drive a car on a 1-mile track for two rounds in a way, that his average speed is 60 mph. on his first round his average speed is 40 mph. how fast does he need to drive, to get the right speed average?

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Atest driver has to drive a car on a 1-mile track for two rounds in a way, that his average speed is...
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