The length of the side of the square is 6 cm. Its area is equal to the area of the rectangle

The length of the side of the square is 6 cm. Its area is equal to the area of the rectangle, the length of which is 9 cm. What is the width of this rectangle.

Let’s calculate what the area of the first geometric figure will correspond to if we know, based on the conditions of this task, that the side of the square is 6 centimeters:
6 * 6 = 36.
Let’s calculate what the value of the width of the second geometric figure will correspond to, if we know, based on the conditions of this task, that the value of the first dimension of the rectangle is 9 centimeters:
36: 9 = 4.
Answer: The width of the second shape, the rectangle, is 4 centimeters.