The scale on a map is one inch and represents 8 miles. if two cities are 2 and a 1/2 inches apart on the map, How far are they in reality?
If 1 inch on the map represents 8 miles, then 2.5 inches on the map represent 2.5 * 8 = <<2.5*8=20>>20 miles in reality.
Therefore, the two cities are 20 miles apart in reality.