Предмет: Математика, автор: 06070607

Две бригады сшили 441 детский костюм,работая вместе.Первая бригада изготовила 28 костюмов в час,а вторая-21 костюм в час.Сколько часов бригады шили костюмы?

Ответы

Автор ответа: vvkh

28+21=49 костюмов в час изготавливали вместе

441/49=9 часов работали

Автор ответа: ser2012

441:(28+21)=9 часов бригады шили костюмы..............

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