Предмет: Математика, автор: oto123456

СРОЧНО ОТДАМ 25 БАЛЛОВ
6 тракторов за 8 часов обрабатывают пшеницу на площади 288 га. За сколько часов 7 тракторов уберут урожай на площади 126 га? »

Ответы

Автор ответа: prettypushkova
1

1) 288 : 6 : 8 = 288 : (6 · 8) = 288 : 48 = 6 (га) - обработает 1 трактор за 1 час;

2) 6 · 7 = 42 (га) - обработают 7 тракторов за 1 час;

3) 126 : 42 = 3 (ч) - время работы.

Ответ: за 3 часа.

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