In the park, there are two flower beds with equal perimeter. The rectangular one is 40 meters long and 20 meters wide. How about the area of the other square one?

In the park, there are two flower beds with equal perimeter. The rectangular one is 40 meters long and 20 meters wide. How about the area of the other square one?

The side length of the square is (40 + 20) × 2 △ 4 = 30 meters
The area of square flower bed is 30 × 30 = 900 square meters

A farmer dug a new round pool, the perimeter of the pool is 50.24 meters, how many square meters is the area of the pool?

It is known that C = 50.24m, r = C ﹣ 2 ﹣ π = 50.24 ﹣ 2 ﹣ 3.14 = 8 (m); s = π R2 = 3.14 × 82 = 3.14 × 64, = 200.96 (M2); a: this round pool covers an area of 200.96 square meters

Uncle Wang plans to surround a rectangular vegetable field with a circumference of 30 meters. The length and width are the whole meters. How many different methods are there? What is the area of each rectangular vegetable plot? Fill in the form below. Which enclosure has the largest area? 1234567 length (m) width (m) area (M2)

Since 15 = 1 + 14 = 2 + 13 = 3 + 12 = 4 + 11 = 5 + 10 = 6 + 9 = 7 + 8, there are seven schemes. The rectangular area of each scheme is as follows: scheme 1: 1 × 14 = 14 (square meters); scheme 2: 2 × 13 = 26 (square meters); scheme 3: 3 × 12 = 36 (square meters); scheme 4: 1 × 14 = 14 (square meters)