Предмет: Математика, автор: Papi2004

3 дворника могут подмести площадь за 7 часов. За сколько времени подметут эту же площадь если придут ещё 4 дворника?

Ответы

Автор ответа: Чикси10

0

7×3=21(ч.)
Ответ: за 21 час.

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