题目信息
The figure above shows some of the dimensions of a triangular plaza with an L-shaped walk along two of its edges. If the width of the walk is 4 feet and the total area of the plaza and walk together is 10,800 square feet, what is the value of x ?
A:200
B:204
C:212
D:216
E:225
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正确答案：
A:200
Geometry Polygons; Area
The area of the triangular plaza is given by
, and the area of the walkway is given by (x + 4)(4) + (96)(4). Since the total area of the plaza and walkway is 10,800, it follows that 52x + 400 = 10,800 and x = 200.
The correct answer is A.
The area of the triangular plaza is given by
, and the area of the walkway is given by (x + 4)(4) + (96)(4). Since the total area of the plaza and walkway is 10,800, it follows that 52x + 400 = 10,800 and x = 200.The correct answer is A.
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