Hints and solutions to Draw a Picture #3

A 9 meter by 12 meter rectangular garden has a walk one meter wide all around it. What is the area of the walk?

• Armed with the picture:
  
  You can see that the sidewalk can be divided up into several rectangles. For instance, you can divide it into 4 rectangles along the garden - two of these will be 9 meters by 1 meter (total area: 18 square meters), two of them will be 12 meters by 1 meter (total area: 24 square meters), and there will be four 1-by-1 meter squares in the corners, for 4 more square meters. So the total area of the sidewalk is 18 + 24 + 4 = 46 square meters.