Platinum is a very rare metal, even rarer than gold. Its density is 21.5g/cm3.
Assuming that the world production has been about 110 tonnes for each of the
past 50 years, and negligible before that, which of the following has a
comparable volume to that of the total amount of platinum ever produced?
A: a shoe box, B: a cupboard, C: a house, D: Buckingham Palace, E: the grand Canyon