Find the extent of Africa from west to east at 10 degrees N.

The coordinates of the westernmost point are 14 degrees west longitude.
The coordinates of the easternmost point are 52 degrees east longitude. Hence:
14 * + 52 * = 66 *
At a specific parallel 1 * = 109.6 km, 66 * × 109.6 km = 7233.6 km



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