## 206. Math Puzzle $7 / 82$

We know that the continents move on the Earth's crust and that, for example, South America drifts about $3 \mathrm{~cm}$ per year.

By how much has the landmass moved in the 6000 years of recorded history?
The continental drift is

$d=3 \mathrm{~cm} / \mathrm{year} \cdot 6000$ years $=18000 \mathrm{~cm}=180 \mathrm{~m}$.