12. Given that 1) the average density of the rock which comprises theHimalaya is 2.8 g/cm3, 2) the average density of lithospheric mantleis 3.3 g/cm3, 3) the maximum elevation of the Himalaya is 8.8 km,and 4) the average rate at which mountains are eroded is 0.2 mm/yr, calculatehow long it would take for the Himalaya to be eroded down to sea level. Showyour working.
Clue: You are provided with density data for a reason. Is it only 8.8 kmwhich needs to be eroded? What does Archimedes principle tell us?
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