GUJCET 2015 Chemistry Solved Paper

Two electrolytic cells containing molten solutions of Nickel chloride & Aluminium chloride are connected in series. If same amount of electric current is passed through them, what will he the weight of Nickel obtained when 18‌gm of Aluminium is obtained? ( Al−27‌gm∕mole,Ni−58.5‌gm∕mole−1 )