Answer:20 ohms
Explanation:
R1=40 ohms
R2=40 ohms
Let total resistance be R
It is a parallel connection
1/R=1/R1 + 1/R2
1/R=1/40 + 1/40
1/R=(1+1)/40
1/R=2/40
Cross multiply
1x40=2xR
40=2R
Divide both sides by 2
40/2=2R/2
20=R
R=20
Total resistance is 20 ohms
