Palabora mine Phalaborwa is a South African copper mine that is nearly 2000 m wide. a total of 4.1 million tonnes of copper have been extracted from this mine. Imagine the total output of pure copper was
compacted into the shape of a sphere. The
size of this sphere would be much smaller
than the total amount of material extracted
from the mine. Find the radius of the
copper sphere, given that 1 m³ of copper
weighs about 8930 kg.
