A map with a scale of 1 inch : 10 miles is used to make a map with a scale of 1 inch : 20 miles. The distance from one city to another on the map with scale 1 inch : 10 miles is 5 inches. How can you find the corresponding distance on the map with scale 1 inch : 20 miles? Multiply 5 by 1/20.
Multiply 5 by 1/2.
Multiply 5 by 20.
Multiply 5 by 2.