Предмет: Математика, автор: kolya20kolya2008

6. Катер за 2 часа по озеру и за 3 часа против течения реки проплывает такое же расстояние, если будет плыть по течению реки 4.5часа. Скорость течения реки 2 км ч. Найти собственную скорость катера.уравнением с решением

Ответы

Автор ответа: zinovicgrigorij
0

Ответ: 30км/час

Пошаговое объяснение: для решения этой задачи примем скорость катера за х, тогда скорость по течению будет х+2, а против течения х-2. Составим уравнение вида:

х*2+(х-2)*3=(х+2)*4,5;

2х+3х-6=4,5х+9;

0,5х=15;

х=30км/час - это и есть собственная скорость катера.

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