A map has a scale of 1 cm : 20 km. Two cities are 2.5 cm apart on the map. To the nearest tenth of a kilometer, what is the actual distance corresponding to the map distance?.
y is the measurement in kilometer. Multiplying 20 by 2.5 and dividing by 1. This is by cross multiplication which is a simpler method in evaluating fractions and finding for the unknown. The answer is 50 km.