Предмет: Алгебра, автор: Record300

поезд,двигаясь равномерно со скоростью 57 км/ч,проехжает мимо пешехода,идущего параллельно путям со скоростью 3км/ч навстречу поезду,за 18 секунд. найдите длину поезда в метрах.

Ответы

Автор ответа: prettypushkova

1 ч = 3 600 с
18 с = (18 : 3 600) ч = 0,005 ч
1 км = 1 000 м
s = v * t - формула пути
-----------------------------------------------
1) 57 + 3 = 60 (км/ч) - скорость сближения;
2) 60 * 0,005 = 0,3 (км) = (0,3 * 1 000) м = 300 (м) - длина поезда.
Ответ: 300 м.

Record300: Сппсибо большое,завтрв писать Экзамен ,а и незнаю как решать,вдргу побадется))

prettypushkova: Желаю тебе успешно сдать экзамены. Перед экзаменами главное - хорошо выспаться. Удачи тебе!

Record300: Спасибо большое,если вопросы буду еще можно задам?

Record300: будут*

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