Предмет: Математика, автор: elena323

Первый рабочий за один час делает 32 детали, а второй за 4 часа столько же деталей,сколько первый за 5 часов. За сколько сделают 216 деталей при совместной работе?

Ответы

Автор ответа: dedovaleshka

32:5=6.4(д)-первый за час 32:4=8(д)-второй за час 8+6.4=14.4(д)-совместно за час 216:14.4=15(ч) Ответ:15ч.

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