Теплоход, двигаясь по течению реки за 1 час . найдите скорость теплохода против течения реки, если скорость течения равна 3 1/2 км /ч
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01.10.2019 06:00
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Скорость теплохода по течению 34 4/5 км/ч.
34 4/5 - 3 1/2 = 34,8 - 3,5=31,3 км/ч скорость теплохода
31,3 - 3,5 = 27,8 км/ч скорость теплохода против течения