datonman wrote:A border of uniform width is placed around a rectangular photograph that measures 8 inches by 10 inches. If the area of the border is 144 square inches, what is the width of the border, in inches?
A.)3
B.)4
C.)6
D.)8
E.)9
Total area = (area of the photo) + (area of the border) = (10*8) + 144 = 224.
We can PLUG IN THE ANSWERS, which represent the width of the border.
When the correct answer choice is plugged in, the total area will be 224 square inches.
Answer choice B: 4
The following figure is implied:
In this case, total area = bh = (4+10+4)(4+8+4) = (18)(16) = 288.
Since the total area must be LESS THAN 288, the width of the border must be LESS THAN 4.
The correct answer is
A.
Answer choice
A: 3
The following figure is implied:
In this case, total area = bh = (3+10+3)(3+8+3) = (16)(14) = 224.
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