Example #6: A metal cup of surface area 200. cm- needs to be electroplated with silver to a thickness of 0.200 mm. The density of silver is 1.05 x 104 kg m 3 The
mass of a silver ion is 1.79 x 10-25 kg and the charge is the same magnitude as that on
an electron. How long does the cup need to be in the electrolytic tank if a current of
12.5 A is being used?