Предмет: Математика, автор: Лизф

Задача с дробями. Два пешехода вышли одновременно из пункта А и В навстречу друг другу и встретились через 20 мин, а ещё через 25 мин первый пешеход пришёл в В. через сколько минут после встречи второй пешеход пришёл в А?

Ответы

Автор ответа: AkimoVaTania

0

1-й пешеход 25 мин шел то расстояние, которое 2-й прошел за 20 мин. За сколько мин 2-й пешеход пройдет расстояние, который 1-й шел 20 мин? Составим соотношение: 25 мин (1-й) ----------- 20 мин (2-й)

20 мин (1-й) ----------- Х мин (2-й)

Х=20*20/25, Х=16 мин.

Ответ; за 16 мин.

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