Предмет: Математика, автор: иакс1

Нужно сделать 180 оконных рам. Одна бригада столяров может сделать эту работу за 45 дней, а вторая - за 36 дней. За сколько дней эти бригады смогут сделать рамы, работая вместе?

Ответы

Автор ответа: НикитосРаша
2
45-36 равно-9 дней
ответ:за 9 дней
Автор ответа: infoinessa
6
180:45=4 рамы в день производительность 1 бригады 180:36=5 рам в день производительность 2 бригады 180:(5+4)=20 дней будут делать вместе
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