You purchase a rectangular piece of metal that has dimensions 10.0 mm ×× 20.0 mm ×× 30.0 mm and mass 4.56×10−2 kg . The

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You purchase a rectangular piece of metal that has dimensions
10.0 mm ×× 20.0 mm ×× 30.0 mm and
mass 4.56×10−2 kg . The seller tells you that
the metal is gold. To check this, you compute the average density
of the piece.
a) What value do you get?
Express your answer in kilograms per cubic meter.
b)Were you cheated?