1)1+(3-1)=1+2=3с
2)(6-2)/(3-2)=4/1=4м/с
3)6+6=12м, 4сек
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1)1+(3-1)=1+2=3с
2)(6-2)/(3-2)=4/1=4м/с
3)6+6=12м, 4сек