Platinum is a very rare metal, even rarer than gold. Its density is 21.45g/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?
Select one option, then click Submit.
a shoe box
a cupboard
a house
Buckingham Palace
the Grand Canyon
Select an option, then submit.
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Intermediate Mathematical Challenge 2005 (2005)
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