Предмет: Математика, автор: vika10003003

Два рабочих вместе изготовили 144 одинаковые детали . Первый рабочий за 3 часа изготовил 17 деталей , а второй - 19 деталей . Сколько времени им нужно , чтобы вместе выполнить всю работу ?

Ответы

Автор ответа: Анночка2005

2

1) 17+19=36
2) 36:3ч.=12деталей в час
3)144:36=4ч.
Ответ:за 4часа рабочие сделают 144 детали

vika10003003: спасибо

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