Вопрос школьника по предмету Математика
Катер проплыл по течению реки за 2,4 ч расстояние 55 целых одна пятая км.Скорость течения реки 2,5 кмч . Найдите собственную скорость катера
Ответ учителя по предмету Математика
по течению : (х+2,5)*2,4=55 1/5 (х+2,5)=276/5*10/24 х+2,5=23 х=23-2,5 х=20,5
против течения (х-2,5)*2,4=55 1/5 (х-2,5)=276/5*10/24 х-2,5=23 х=23+2,5 х=25,5
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Hello!
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Bye,
Dima