If the cost of electricity required to deposit 1 g of magnesium is N5.00, how much would it cost to deposit 10g of aluminium?

If the cost of electricity required to deposit 1 g of magnesium is N5.00, how much would it cost to deposit 10g of aluminium?

A N 10.00
B N27.00
C N44.44
D N66.67
E N33.33

jamb 1984 chemistry

The correct answer is D. N66.67

No explanation given

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