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Реши задачу
Катер прошол расстояние межлу пристанями туда и обратно за 4,5. Скорость течения реки 2 км/ч. Собственая скорость катера 18 км/ч. Найдите расстояние между пристанями-
Предмет:
Математика -
Автор:
suárez62 - 5 лет назад
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Ответы 1
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Пусть Х км- расстояние между пристанями,18+2=20 км/ч- скорость катера по течению18-2=16 км/ч- скорость катера против течения Х/20 - время по течениюХ/16 - время против течения Известно, что время туда и обратно равно 4,5 чСоставим уравнение:Х/20+Х/16=4,5 4х/80+5х/80=4,59х/80=4,59х=4,5*809х=360Х=40 км - расстояние между пристанями
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Автор:
chewy14 - 5 лет назад
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