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Автор - freddykrueger1

Первую половину своего движения автомобиль двигался со скоростью 40 км/ч,а вторую - со скоростью 80 км/ч.Найти мреднюю скорость.

Ответ

Автор - blad3518
Vc=S/t                S1= S2
S1=V1*t1
S2=V2*t2        t2=Vt1/V2

Vc=

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