a rectangular plot of land, 12m by 10m hs a path of width 4m all around it, find the area of the path.
Let me help you out:
"A rectangular plot of land, 12m by 10m hs a path of width 4m all around it, find the area of the path."
You can divide the added path into 4 sections:
The top and bottom, plus the 2 sides. It helps if you draw a picture.
You can say the top and bottom's area = $\displaystyle (12 + 4 + 4) * 4 * 2$
You can say that the 2 sides' area = $\displaystyle 10*4 * 2$
Do you know what to do now?