Предмет: Математика, автор: artemijepavlov21

Один трактор может вспахать поле за 14 ч, а другой за 8.
Какой тракторист больше вспашет первый за 7ч или второй за 5ч?

Ответы

Автор ответа: matveika24052011
1

Ответ:

2 тракторист быстрее потому что он делает быстрее

Автор ответа: rakitskyimaks
1

Ответ:

Весь объем работы ( поле) =1

1) 1 : 14= 1/14 объема работы в час производительность I трактора

2) 1 : 8 = 1/8 объема работы в час производительность II трактора

3) 7 * 1/14 =7/14= 1/2 - часть поля, которую вспашет I трактор за 7 ч.

4) 5 * 1/8 = 5/8 - часть поля, которую вспашет II трактор за 5 ч.

6) 5/8 > 1/2 (т.к. 1/2 = 4/8 ; 4/8 < 5/8 ) ⇒ второй трактор вспашет больше

Пошаговое объяснение:

второй трактор вспашет больше за 5 часов, чем первый за 7 часов.

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