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Два автомобиля вышли одновременно навстречу друг другу. Встретившись через 5 часов, они продолжили свой путь, не останавливаясь. Через 3 часа после
встречи расстояние между автомобилями было 135 км, и за это время второй прошел на 15 км больше первого. Сколько времени после встречи потребуется второму автомобилю для завершения своего пути-
Предмет:
Математика -
Автор:
jorgewashington - 6 лет назад
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Ответы 1
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Первый автомобиль после встречи проехал (135-15)/2=60 км Второй автомобиль после встречи проехал 60+15=75 км Скорость первого автомобиля равна 60/3=20 км/ч Скорость второго равна 75/3=25 км/ч. Общая скорость (скорость сближения) автомобилей 20+25=45 км/ч Расстояние между точками 5*45= 225 км Второй автомобиль до встречи проехал 5*25=125 км Для завершения пути второму автомобилю потребуется (225-125)/25=100/25=4 часа
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Автор:
teresaanthony - 6 лет назад
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