Предмет: Математика, автор: pawelkulikovsk

решить задачу на совмесную работу один мастер выкладывает пол плиткой за 8 часов другой за 10 часов .за сколько часов они вылажат пол вместе

Ответы

Автор ответа: Смертишка

за 9 ( (8+10)÷2 (мастера то два))

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