There is a square lawn. As shown in the picture, a 1-meter-wide circular road is built along the lawn. The road surface area is 80 square meters. How about the lawn area?

There is a square lawn. As shown in the picture, a 1-meter-wide circular road is built along the lawn. The road surface area is 80 square meters. How about the lawn area?

The side length of the lawn: (80-1 × 1 × 4) △ 4 △ 1, = 76 △ 4 △ 1, = 19 (meters); the area of the lawn: 19 × 19 = 361 (square meters); a: the area of the lawn is 361 square meters

In a square lawn around, paved with 2 meters wide path. (1) lawn area is how many square meters?
(2) How many square meters is the area of the path?

Lawn area = (20-2 × 2) × (20-2 × 2) = 256 square meters
Area of path = 20 × 20-256 = 144 square meters