Pearson Please help

Question

A certain

blueprint

shows two

fences.

Fence

A is

1 and one half

yards

long but is

1 and four fifths  inches

long on the

blueprint.

What is the unit rate for inches

per

yard

on this blueprint​?

If

fence

B is

15 yards

​long, how long is

fence

B on the

blueprint​?

Answer 1

Set up a proportion:

1 4/5 in/1 1/2 yds = x in/1 yd. Cross multiply to get 1 x 1 4/5 = 1 1/2 x.

x- 1 1/5 (That means scale is 1 1/5 or 1.2 inches per yard.)

If the real fence is 15 yards, just multiply 15 x 1.2 = 18 inches on the scale model.