Rita drew a scale drawing of a picnic area near the river. The picnic area which is is 135 yards long in real life is 15 inches long in the drawing. What scale did Rita use for her drawing?

To find the scale used in Rita's drawing, we need to divide the length of the real picnic area by the length of the drawing:

Scale = Length of real picnic area / Length of drawing
Scale = 135 yards / 15 inches

First, we need to convert the yards to inches, as both measurements need to be in the same unit:
1 yard = 36 inches
135 yards = 135 * 36 = 4860 inches

Now, we can calculate the scale:
Scale = 4860 inches / 15 inches
Scale = 324

Therefore, Rita used a scale of 1:324 for her drawing.