Вопрос школьника по предмету Математика
Путешественник спустился вниз по течению за 2 сут. на плоту,а обратно вернулся теплоходом за 2 часа.Найдите собственную скорость теплохода, если скорость течения реки равна 2 км/ч.
Желательно действиями.
Ответ учителя по предмету Математика
2 сут. = 48 ч
1) 2 км/ч * 48 ч = 96 км — расстояние (проплыл «туда» по течению)
2) 96 : 2 = 48 км/ч — скорость теплохода против течения
3) 48 + 2 =
50 км/ч — собственная скорость теплохода.
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