TWO R WHEN CONNECTED IN PARALLEL GIVE RESULTANT VALUE BECOMES 9 OHM CALCULATE VALUE OF REESISTIVITY

Answer 1

R₁=R/4
1/R₀=4/R₁
R₀=R₁/4= R/4•4= R/16

Answer 2

1/R +1/R =1/9
2/R =1/9
R=18 Ω