Final answer:
To find the length of the actual lawn, multiply the length on the scale drawing by the scale factor.
Step-by-step explanation:
To find the length of the actual lawn, we need to convert the length of the lawn on the scale drawing to actual length using the given scale. The scale used is 1 millimeter: 5 meters. So, for every 1 millimeter on the drawing, it represents 5 meters in real life. The length of the lawn on the drawing is 10 millimeters, so to find the actual length we can multiply it by the scale factor:
10 millimeters * 5 meters/millimeter = 50 meters
Therefore, the actual length of the lawn is 50 meters.