η1=0,6 (60%)
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η1=R/(R+r)
η2=10*R/(10*R+r)
r=R/η1-R=10*R/η2-10*R
η2=10*η1/(1+9*η1)=10*0.6/(1+9*0.6)=0.94 (94%)
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Verified answer
η1=0,6 (60%)
===
η1=R/(R+r)
η2=10*R/(10*R+r)
r=R/η1-R=10*R/η2-10*R
η2=10*η1/(1+9*η1)=10*0.6/(1+9*0.6)=0.94 (94%)
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