Предмет: Математика, автор: ILICofeeILI

Помогите!
Задача.
Один принтер печатает 45 страниц в минуту, а другой - 75 страниц в минуту.

* Сколько минут нужно первому принтеру, чтобы напечатать 1800 страниц?
* Сколько времени нужно для этого второму партнёру?
* За сколько минут будут напечатаны 1800 страниц при одновременной работе принтеров?

Ответы

Автор ответа: abduqodirovaziz
50
1) 1800/45=40 мин
2) 1800/75=24
3) 45+75=120 стр за мин
1800/120=15мин
Автор ответа: олятруш
51
1)1800/45=40(мин)- первому принтеру
2)1800/75=24 (мин)-второму принтеру
3)1800/(45+75)=15(мин) - вместе
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