AP and TS EAMCET Engineering Model Paper 6

A certain quantity of electricity is passed through aqueous Al2(SO4)3 and CuSO4 solutionsconnected in series. 0.09 g of Al is deposited on cathode during electrolysis. The amount of copper deposited on cathode in grams is ? (At.wt.of Al = 27, Cu = 63.6)