Using the map of the hemispheres in the atlas, determine the extent of Africa from west to east at 10 degrees

Using the map of the hemispheres in the atlas, determine the extent of Africa from west to east at 10 degrees S. in degrees and in kilometers.

To determine the length of Africa from west to east, exactly along the 10th parallel of the north east, it is first necessary to show the extreme points of the continent on this parallel: the westernmost point: 10 ° north 13 ° east. farthest eastern point: 10 ° N. 40 ° E etc.
1) on the basis of these data, the length of the continent at 10 ° C. E in degrees: 40 ° – 13 ° = 27 °.
2) Is it possible to determine the length in km in two ways: a) position along the length of the arc. At the 10th parallel, the 1 ° arc length is 109.6 km, d. w. s 27 * 109.6 = 2959.20 km. b) length in kilometers on a scale. On a map of Africa op’N scale 1: 35,000,000