Vср=S/t=(s1+t2*v2)/(s1/v1+t2)=(1500+160*5)/(1500/3+160)=2300/660≈3,5 м/с
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Vср=S/t=(s1+t2*v2)/(s1/v1+t2)=(1500+160*5)/(1500/3+160)=2300/660≈3,5 м/с