The area of one rectangle is equal to the area of the other rectangle. The length of the first rectangle is 18 cm

The area of one rectangle is equal to the area of the other rectangle. The length of the first rectangle is 18 cm and the width is 15 cm, which is equal to the width of the second rectangle if its length is 27.

Before determining the width of the second rectangle, you should find their areas.
The area is the product of the shape’s width by its length.
In this case, we get:
18 * 15 = 270 cm ^ 2.
Find the width of the second rectangle.
To do this, the resulting area should be divided by the length of the known side.
We get:
270/27 = 10 cm.
Answer: the width of the second rectangle is 10 cm.