Mathematics, 27.10.2021 21:50 jells16
HELP PLEASE!!! Mary and Dan started running at the same time. After 20min behind them with the speed of 18km/h Alex started running. Calculate, after how many minutes Alex reached Mary, if we know that he reached Dan after 30min, and the speed ratio between Mary and Dan was 7 : 6 !
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Mary and Dan started running at the same time. After 20min behind them with the spe...
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