Find the area of a rectangle whose sides are equal: a) 2m and 30 dm b) 6 dm and 40 cm

To calculate the area of a rectangle, you need to multiply the length of the rectangle by its width.

a) S = 2 m * 30 dm = 2 * 10 dm * 30 dm = 20 dm * 30 dm = 20 * 30 dm ^ 2 = 600 dm ^ 2 = 6 * 100 dm ^ 2 = 6 * 1 m ^ 2 = 6 m ^ 2;

b) S = 6 dm * 40 cm = 6 * 10 cm * 40 cm = 60 cm * 40 cm = 60 * 40 cm ^ 2 = 2400 cm ^ 2 = 24 * 100 cm ^ 2 = 24 * 1 dm ^ 2 = 24 dm ^ 2.