Question

the ratio of the width to the length of a painting is 3 : 7 . if the painting is 42 inches long how wide is it ?

Answer 1

Answer:

Step-by-step explanation:

3:7=X:42

3/7=X/42

7X=42multiply 3

7X=126

X=126/7

X=18

Answer 2

Answer:

18 inches

Step-by-step explanation:

Let the width of the painting be 3x inches and length be 7x inches.

According to the given problem,  

Length of the painting is 42 inches.

 so, from the above statement we can write

      7x=42

      x=42/7

      x=6

Now, width of the painting is 3x inches.

Therefore, width of the painting will be 3 * 6 =18 inches.

So, the width of the painting is 18 inches.