If V=12R/(r+R), then R=?
A. Vr / (12-V)
B. Vr + V/12
C. Vr - 12
D. V/r - 12
E. V(r+1) / 12
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সঠিক উত্তরঃ
A.
Vr / (12-V)
Explanation:
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