Тракторист вспахал поле за 3 дня. В первый день он вспахал 30% , во второй 40% от остатка, а в третий день оставшиеся 16,8 га. Какой площади поле вспахал тракторист за 3 дня.

Тракторист вспахал поле за 3 дня. В первый день он вспахал 30% , во второй 40% от остатка, а в третий день оставшиеся 16,8 га. Какой площади поле вспахал тракторист за 3 дня.
- Предмет:
  Математика
- Автор:
  rivas
- 5 лет назад

Ответы 1

40%=4/10=2/5

все поле 1

1-4/7-2/5=35/35-20/35-14/35=1/35 поля вспахали в третий день

1/35-48га

1-Хга

Х=1*48:1/35=48*35/1=1680га площадь поля

1680:7*4=960га вспахали в первый день

1680*40%=672га вспахали во второй день

1680-(960+672)=48га вспахали в третий день
- Автор:
  gracie90
- 5 лет назад
- 0
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Тракторист вспахал поле за 3 дня. В первый день он вспахал 30% , во второй 40% от остатка, а в третий день оставшиеся 16,8 га. Какой площади поле вспахал тракторист за 3 дня.

Ответы 1

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