s1=50 м s2=0 s=50 м t1=10 c t2=20 c t3=20 c vcp=?
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vcp=(s1+s2+s3)/(t1+t2+t3)=(50+0+50)/(10+20+20)=2 м/с
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s1=50 м s2=0 s=50 м t1=10 c t2=20 c t3=20 c vcp=?
===
vcp=(s1+s2+s3)/(t1+t2+t3)=(50+0+50)/(10+20+20)=2 м/с
==========================