Question

plz answer it faster
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Answer 1

1 ohm and 2 ohm resistances are in series combination,

R' = 1+2 = 3 ohm

Now, R' and 3ohm resistances will be in parallel combination,

1/R'' = 1/3+1/3

R" = 3/2 = 1.5 ohm

R", 4 ohm and 5 ohm resistances are in series combination,

Thus,

R = R" + 4 + 5

R = 1.5 + 4 + 5 = 10.5 ohm