As shown in the figure, the perimeter of square a is 24 cm, and that of square B is 12 cm. What is the perimeter of the figure made up of a and B?

As shown in the figure, the perimeter of square a is 24 cm, and that of square B is 12 cm. What is the perimeter of the figure made up of a and B?

24 + 12-12 △ 4 × 2 = 24 + 12-6 = 36-6 = 30 (CM); a: the perimeter of the figure made up of a and B is 30 cm

With 24 square with side length of 1cm, what figure can you spell out besides a rectangle? What's the perimeter?

It looks like it's just a rectangle

On a 1:40000 drawing, there is a square with side length of 4cm. Please calculate the actual area of the square
Determinant

1: 40000 = 1cm stands for 400m (40000 cm)
（4×400）×（4×400）=2560000m²=2.56km²
A: the actual area of this square is 2.56 square kilometers