Предмет: Математика, автор: mozila

пароход проплыл 74.58км по течению реки и 131.85 км против течения. Сколько времени пароход был в пути. если его собственная скорость 31.6 км/ч. а скорость течения 2.3км/ч?

Ответы

Автор ответа: egshev

1) 31,6+2,3=33,9км/ч скорость по течению

2) 31,6-2,3=29,3км/ч скорость против течения

3) (74,58:33,9)+(131,85:29,3)=2,2+4,5=6,7 ч или 6ч 42мин

Ответ: 6,7 ч

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