Asked by Bailey

The plane tectonic theory describes the motion of the continents across the face of Earth. Measurements suggest that Africa and South America were once connected and are drifting apart at an average rate of 3cm/yr. If the two continents are now 7x10^8 cm apart, how long has this drift been taking place?
Answered by bobpursley
time=distance/velocity= 7E8/3 years
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