Question

In a scale drawing, 3 inches
represents 10 miles. How many
inches represent 45 miles?

Answer 1

Cross multiply, 3:10, x:45 10x/10 : 135/10 x = 13.5
Answer: 13.5

Answer 2

13.5 inches

Explanation:

3inches:10 miles

x inches: 45 miles

do cross multiply:

3*45=135

10*x=10x

so 135=10x

x=13.5 inches