Concept:Map scale relates map distance to actual distance.Explanation:The scale of the map tells us that 1 unit on the map represents 250000 units in reality. Here, the units are centimeters.So, 1 cm on the map represents 250000 cm in actual distance.We are given that the distance between two cities on the map is 6 cm.To find the actual distance, we multiply the map distance by the scale factor:Actual distance = Map distance × Scale factorActual distance = 6 cm × 250000Actual distance = 1500000 cmNow, we need to convert this distance from centimeters to kilometers. We know that 1 kilometer (km) is equal to 100000 centimeters (cm).To convert cm to km, we divide by 100000.Actual distance in km = $\frac{1500000 \text{ cm}}{100000 \text{ cm/km}}$Actual distance in km = 15 kmAnswer:15 Km