One kimberlite deposit has an area of 50 000m2 at ground level and a depth of 2km. Estimate the volume of the kimberlite deposit.
Turn the depth from km into m (to get 2000m) then multiply this depth by the given area (in square metres). The result will be in cubic metres.
Alternatively, turn the surface area into square km (divide by 10^6) and multiply by the given depth (in km). The result will be in cubic km.