Предмет: Математика, автор: naila26

Одна труба может наполнить бассейн за 12 часов,а другая за 8 часов.Через сколько времени наполнится 5/6 бассейна, если будут включены обе трубы? Подробное решение пожалуйста!

Ответы

Автор ответа: lizaliza453

объем бассейна обозначим за 1 тогда скорость первой трубы-1/12, а второй- 1/8

1/(1/12+1/8)- за это время они заполнят бассейн вместе, а 5/8 за 5/(8(1/12+1/8))=3, за 3 часа они заполнят 5/8 бассейна

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