F1/F2=L1/L2⇒L2=L1×(F2/F1)
L2=3×(3000/2000)=4,5см
Ответ: L2=4,5см
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F1/F2=L1/L2⇒L2=L1×(F2/F1)
L2=3×(3000/2000)=4,5см
Ответ: L2=4,5см