A poster is 3 inches long. It is 4 times as wide as it is long.

30 To find the width of the poster, we can use the given information that it is 4 times as wide as it is long. Let's set up an equation to solve for the width.

Let's denote the length of the poster as "L" and the width as "W".

Given:
Length (L) = 3 inches
Width (W) = 4 times the length (W = 4L)

We can substitute the value of the length into the equation for the width:
W = 4L
W = 4(3)
W = 12

Therefore, the width of the poster is 12 inches.