дано s1=50м s2=30м t1=5c t2=15c Vср-?
Vср=(S1+S2)\(t1+t2)=80\20=4 м\с
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дано s1=50м s2=30м t1=5c t2=15c Vср-?
Vср=(S1+S2)\(t1+t2)=80\20=4 м\с