Answer: 4 cm
Explanation:
This is an easy one-step function:
18w=72
The equation that can be derived using the formula' lw=A ' where it shows length times width equals the area of the rectangle. We know thw are and length and hence can substitute the above variables.
Next, we divide each side by 18
18/18 * w = 72/18
w = 4
We then get width equals 4 cm.