Question

Please say the proper answer for this question please ​

Answer 1

Answer:

for R1 and R2 equivalent resistance will be

1/R1+1/R2=1/10+1/40

1/R=1/8

R=8 ohm

for R3,R4,R5 let equivalent resistance for these 3 resistors is R'

1/R3+1/R4/1+R5 = 1/30+1/20+1/60

1/R'=1/10

R'=10 ohm

for R AND R' let their equivalent resistance is R''

1/R+1/R' = 1/8+1/10

1/R''=1/18/80

R''=80/18=40/9

now current(I) =V/R

V = 12 AND R= 40/9

I = 12/(40/9)

I = 12*9/40

I= 27/10

I= 2.7 A