A path 1m wide is built along the border and inside a square garden of 30m. What's the area of the path

Along two opposite sides of the square, the path is 30 m long and 1 m wide.

Along the other two opposite sides of the square, the path is 28 m long and 1 m wide.

area = 2 (30 m * 1 m) + 2 (28 m * 1 m) = 60 m^2 + 56 m^2 = 116 m^2