Question

On a​ map, 1 inch equals 15 miles. If two cities are 6 inches apart on the​ map, how far are they actually​ apart?

Answer 1

1 inch = 15 miles

6 inches = 6*15 = 90miles

Answer 2

1 in/ 15 miles = 6 in/ x miles

using cross products

1 * x = 15 *6

x = 90

the distance is 90 miles