find current in figure
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Explanation:
v=ir
r=equivalent resistance
r=r1+r2
r=20+20=40
1/r4=1/r2+1/r3
1/r4=1/40+1/20
1/r4=60/800
r4=13.34
i=v/r
i=4/13.34
i=0.299 ampere
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