Hambatan pengganti titik A dan B

1/RP= 1/3+1/6
1/RP=2/6+1/6
RP=6/3
RP=2

1/RPtotal=1/(2+10)+1/12
1/RPtotal=1/12+1/12
RPtotal=12/2
RPtotal=6

Rtotal=RPtotal+6
Rtotal=6+6
Rtotal=12

semoga membantu