Use the ruler and map scale to determine the distance between Kiev and Cairo.

The distance between Kiev and Cairo on the map is approximately 7.5 cm.

Map scale 1: 50,000,000.

On a map with a scale of 1: 50,000,000, 1 centimeter of the map displays 50,000,000 centimeters of real terrain.

In this case, the distance between cities will be:

7.5 * 50,000,000 = 375,000,000 centimeters.

We translate this distance from centimeters to kilometers.

Since 1 km – 1000 meters, and 1 meter – 100 cm, we get:

375000000/100000 = 3750 km.

Answer: The distance between Kiev and Cairo is 3750 km.