Question

On a blueprint, the living room is 2.1 inches wide. The blueprint has a scale of 1 inch to 10 feet. How wide, in inches, would the living room be on a blueprint that has a scale of 1 inch to 15 feet?

A. 1.4 inches
B. 2.1 inches
C. 3.15 inches
D. 21 inches

Answer 1

a. 1.4 inches

Explanation:

1 inch : 10 feet

x 2.1 x 2.1

= 2.1 inch: 21 feet

1 inch : 15 feet

x inches : 21 feet

1/x = 15/21

21 = 15x

7/5 = x

1 2/5 inches = 1.4 inches