Suppose you have a map with a scale of 1: 25,000 and that city a is four centimeters away from city b on the map. how many centimeters apart are they on the surface of the earth?

1km

Explanation:

A scale of 1:25,000 means that 1 meter  on the map equals 25,000 meters on the ground.  

So,

Converting 4cm to meter;

4cm/100 = 0.04m

If;

1m = 25,000m

0.04m = ?

25,000 * 0.04 = 1000m

it being an ocean esketit where we droppin