What is the total resistance in a circuit having 3 feet of 10-ohm/ft wire, with two 15-ohm resistors wired in parallel? I used the formula; Rtotal=R1XR2/R1+R2 & got 7.5ohms. 7.5ohms is not one of the choices for an answer. I went back over the text & did not find anything to help find another answer. I am not sure how nor if the wire length & resistance should figure into the problem solving.