you want to find the resistivity from the information in the first 2 sentances using: resistivity=(resistance x area)/length (make sure to convert to meters first)
then rearrange the equation to get: Resistance= (resistivity x length)/ area, use the saem resisitivyty you just calculated before, then for one of them you should get 0.15Ohm. lmk if that didnt make sense, also this exquation is in the A-level formual booklet (well it is aqa at least)
hope that helped