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?

3.6 inches
18.2 inches
60 inches
90 inches

Answer 1

the wall lenght is 90

Explanation:

you know the scale factor is 1/5 so you take the lenght of the drawing and multipy it by 5.

Answer 2

The length of the mural was 90 inches.

Explanation:

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 =
`(1)/(5)`

the sketch was 18 inches long.

Let the length of the mural be x

the actual length of the mural =
`(1)/(5)`x = 18

x = 18 × 5

x = 90

The length of the mural was 90 inches.