What net area of erosion-control mat remains after subtracting the inlet protection box?
Correct Answer
B) 2272 sf
The net area is the outer rectangle minus the dashed deduction box, or 2272 sf.
Why This Is the Correct Answer
The net area is the outer rectangle minus the dashed deduction box, or 2272 sf.
Why the Other Options Are Wrong
Option A: 2352 sf
This is the full outer rectangle and does not subtract the dashed deduction box.
Option C: 2192 sf
This subtracts the deduction box twice.
Option D: 672 sf
This multiplies the full length by only the deduction-box width.
Memory Technique
For erosion-control mat after inlet box deduction net area, outside area first, interior deduction second.
Reference Hint
Open Sheet C-932; read the outside dimensions and the dashed deduction dimensions.
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