Final answer:
The length of Amita's kitchen is 0.25 meters.
Step-by-step explanation:
The area of a rectangle is found by multiplying its length and width. In this case, the area is given as 3 square meters and the width is 12 meters. To find the length, we can divide the area by the width. So, the length of Arta's kitchen is 3/12 = 0.25 meters. Therefore, the length of Amita's kitchen is 0.25 meters.