We are asked to determine how many square meters are considered for the green area (in gray) from the given diagram.

Steps to solve:

1. Break the shape into two parts:

   • The trapezoidal part on the top left.
   • The rectangular part below the trapezoid.

2. Calculate the area of the trapezoid:

   • The height of the trapezoid is 28 m.
   • The lengths of the parallel sides are 20 m (bottom) and 16 m (top).
   • The formula for the area of a trapezoid is: $A_{\text{trapezoid}} = \frac{1}{2} \times (a + b) \times h$ where $a$ and $b$ are the lengths of the parallel sides, and $h$ is the height.

3. Calculate the area of the rectangle:

   • The rectangle has a length of 4 m and a width of 16 m.
   • The formula for the area of a rectangle is: $A_{\text{rectangle}} = \text{length} \times \text{width}$

4. Sum the areas of the trapezoid and the rectangle to get the total area.

Let me calculate that now.The total area of the green (gray) space in the diagram is 568 square meters. This value seems inconsistent with the answer choices provided, so it seems there might be a misunderstanding in interpreting the dimensions or parts of the figure. Would you like to explore this further to ensure all aspects of the problem are correctly addressed?

Meanwhile, here are some related questions you might consider:

1. How do you calculate the area of composite figures like this?
2. What might have caused the discrepancy between the calculated area and the answer choices?
3. Could the units or scale in the diagram influence the interpretation of the problem?
4. How would you calculate the area if there were irregular shapes involved?
5. How does the placement of the departments affect the calculation?

Tip: Always double-check the dimensions and shapes, especially when dealing with composite figures or when areas are visually segmented.