Предмет: Математика, автор: ekuubn

Корабль прошел 150 км за 4 часа по течению. Если скорость потока 4,5 км/ч, сколько времени потребуется, чтобы вернуться?

Ответы

Автор ответа: laurarollan

Ответ:

чтобы вернуться нужно 3часа 22мин

Автор ответа: 8o4ko

Ответ:

5,26ч

Пошаговое объяснение:

Найдем скорость корабля по течению: 150/4= 37,5 км/ч.
Теперь найдем собственную скорость корабля - 37,5 - 4,5= 33 км/ч
Затем найдем скорость корабля против течения: 33-4,5 = 28,5 км/ч
Остается найти время: 150/28,5 ≈ 5,26ч.

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