The air distance between London and Cairo is 3510 km. On a map, this distance is represented by 30 cm. We need to find out how many kilometers one centimeter on the map represents.

1. Problem Description

The air distance between London and Cairo is 3510 km. On a map, this distance is represented by 30 cm. We need to find out how many kilometers one centimeter on the map represents.

2. Solution Steps

We are given that 30 cm on the map represents 3510 km in reality. To find out how many kilometers 1 cm represents, we need to divide the actual distance by the map distance.

So, the number of kilometers represented by 1 cm is:

$Kilometers\ per\ cm = \frac{Total\ Kilometers}{Total\ Centimeters}$

$Kilometers\ per\ cm = \frac{3510\ km}{30\ cm}$

$Kilometers\ per\ cm = 117\ km/cm$

3. Final Answer

117 km