Please help with this math problem. There is a rectangular piece of land that will be used for landscaping. It is 22x30 ft. It has a 1 ft. wide trench that is on the inside of the rectangle, and runs along the edges (like a frame) throughout the inner perimeter. Also it has a 4 ft. deep excavation that will be used for planting. What is the cubic feet measurement of this rectangle? As a side note the answers on the multiple choice test ranged between 300 to 400. Not any less or more. Please advise with solution. I am stumped. None of my answers come close. I understand the volume of a rectangle is LxWxH.

There is a rectangular piece of land that will be used for landscaping. It is 22x30 ft. It has a 1 ft. wide trench that is on the inside of the rectangle, and runs along the edges (like a frame) throughout the inner perimeter. Also it has a 4 ft. deep excavation that will be used for planting. What is the cubic feet measurement of this rectangle?
As a side note the answers on the multiple choice test ranged between 300 to 400. Not any less or more. Please advise with solution. I am stumped. None of my answers come close. I understand the volume of a rectangle is LxWxH.
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