Question

Maria's family has a square plot of land of side 20 m. A path 1 m. wide runs
around it from outside. Lets find the area of the path.​

Answer 1

Answer:

$20 \times 20 - (20 - 1) \times (20 - 1) \\ \\ = 20 \times 20 - 19 \times 19 \\ \\ = 400 - 361 \\ \\ = 39$