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1. Пароход плыл 1.5 часа со скоростью 36,4 км/час и 0.5 часа со скоростью 33.6 км/час.Найти среднюю скорость движения 2. уравнение: 4.28(x-45)=16.38
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Предмет:
Математика -
Автор:
ifigenia - 6 лет назад
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Ответы 1
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Итак, средняя скорость = путь/время. Время у нас есть, два часа. Путь найдем. 36.4*1.5 + 33.6*0.5 = 54.6 + 16.8 = 71.4 Средняя скорость = 71.4/2 = 35.7.
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Автор:
hectorstephens - 6 лет назад
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