Предмет: Математика, автор: нуркось

две строительные бригады должны проложить железнодорожные пути по 2240 км каждая. Одна бригада может прокладывать за неделю 16 км пути другая 14 км На сколько недель одна бригада опередит другую реши задачу

Ответы

Автор ответа: ksenya13love
0
1)  2240 км : 16 км/неделю =  140  недель  - будет работать первая бригада 2) 2240 км : 14 км/неделю =  160  недель -  будет работать вторая 3) 160 нед. - 140 нед. = 20 недель -   первая бригада опередит вторую


На 20 недель.
2240/16=140 недель первая бригада будет делать.
2240/14=160 недель другая бригада.
160-140=20 недель.

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