Предмет: Математика, автор: Ann110320021

А) Двигаясь по течению  реки , катер за 4 ч прошёл 72 км . Какова собственная скорость катера , если скорость течения реки - 2 км / ч
Б) Двигаясь против течения  реки , теплоход за 3 ч прошёл 63 км . Какова скорость течения реки , если собственная скорость теплохода - 23 км / ч

Ответы

Автор ответа: AsyMortenson
0
А) 1)72:4=18 км/ч 1) 18-2=16 км/ч Б)1) 63:3=21 км/ч 2) 23-21=2 км/ч 
Автор ответа: polli2014
0
(72 - 4х2) : 4 = 16 км/ч 
ОТвет: 16 км/ч скорость катера

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