Multiply the actual length of the snack stand, 30 feet, by the scale factor,

To find the length of the snack stand on the map, you need to use the scale factor given. The scale is:

1 cm = 3 feet.

Given that the actual length of the snack stand is 30 feet, you can set up the conversion like this:

\[ \text{Length on map (cm)} = \frac{\text{Actual length (feet)}}{\text{Scale factor (feet per cm)}} \]

In this case, the scale factor is 3 feet/cm.

Now, substituting the values into the formula:

\[ \text{Length on map (cm)} = \frac{30 \text{ feet}}{3 \text{ feet/cm}} = 10 \text{ cm} \]

So, the length of the snack stand on the map is 10 cm.