Предмет: Математика, автор: час2

1. Через Первую трубу бак наполняется за 15 минут за сколько минут наполнится бак через старую трубу если две трубы вместе наполняют его за 10 минут

Ответы

Автор ответа: IlgarIsmailof

0

(15-10)+15=20
ответ:за 20 минут

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