Question

Brianna went on a trip to the art museum and sketched a scale drawing of a rectangular wall mural. She used a scale factor of 0.2. The sketch was 12 inches wide and 18 inches long. What was the length of the mural?

Answer 1

Answer: D 90 inches

Explanation:

Answer 2

The length of the mural was 90 inches

Explanation:

The scale is the relationship that exists between the magnitudes of a drawing and the actual dimensions. This is:

`scale factor=(drawing length)/(actual length)`

scale factor = Drawing length /Actual length

In this case, you have that:

• scale factor= 0.2
• drawing length= 18 inches

So:

`0.2=(18 inches)/(actual length)`

Solving this, you get:

`actual length=(18 inches)/(0.2)`

actual length=90 inches

So, the length of the mural was 90 inches