From the information given,
1 cm on map = 30km actual distance
6.5 cm on map = x km actual distance
Thus, the proportion is
30 kilometers/1 centimeter = x kilometers/6.5 centimeters
By cross multiplying,
x * 1 = 6.5 * 30
x = 195
Two cities are approximately 6.5 centimeters apart on the map, then the actual distance is 195 kilometers