Предмет: Математика, автор: Гринька

два крана , включенные одновременно, заполняют бак за 12 минут. Если бы первый кран работал один, то на заполнение бака ему потребовалось бы 18 минут. Сколько минут на это потребуется второму крану

Ответы

Автор ответа: ZmеY

Скорость двух кранов 1/12 бака в минуту.

Скорость первого 1/18 в минуту

Х+1/18=1/12

Х=1/12-1/18

Х=1/36

Ответ 36 минут

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