Автор - zannakusekbaeva572

Моторлы қайық барлық жолға 0.75сағ уақыт жұмсап, өзен ағысымен 8км, өзен ағысына қарсы 3км жүзіп өтті.Өзен ағысының жылдамдығы 2км/сағ болса, қайықтың меншікті жылдамдығын табыңдар.​

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