total resistance for this figure. With full solution
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Answer:
7.5ohm
Explanation:
1/R=1/R1+1/R2
R1=(10+10+10)ohm = 30ohm as they are all connected in series
R2=10ohm
1/R=1/30+1/10
1/R=4/30ohm^-1
R=30/4ohm
R=7.5ohm.
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