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The figure above represents a red square piece of paper with a white c

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The figure above represents a red square piece of paper with a white c  [#permalink]

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New post 05 Sep 2018, 00:34
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

80% (00:28) correct 20% (00:21) wrong based on 20 sessions

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The figure above represents a red square piece of paper with a white circular piece of paper taped on top of it and extending to the edges. How much of the red piece of paper, in square inches, still shows?

(1) The area of the red piece of paper is 16 square inches.
(2) The area of the white piece of paper is 4π square inches.

Attachment:
image012.jpg
image012.jpg [ 2.89 KiB | Viewed 151 times ]

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Re: The figure above represents a red square piece of paper with a white c  [#permalink]

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New post 05 Sep 2018, 00:39
IMO D

In either case you can derive the side of the square and the radius of the circle from any of the areas in given in option A and option B.

Radius of circle = half of side of square.

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Re: The figure above represents a red square piece of paper with a white c  [#permalink]

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New post 05 Sep 2018, 00:45
Bunuel wrote:
Image
The figure above represents a red square piece of paper with a white circular piece of paper taped on top of it and extending to the edges. How much of the red piece of paper, in square inches, still shows?

(1) The area of the red piece of paper is 16 square inches.
(2) The area of the white piece of paper is 4π square inches.

Attachment:
image012.jpg



area left = area of square - area of circle
we need only the diameter/side of the square

(1) The area of the red piece of paper is 16 square inches.
side=4 = diameter
sufficient

(2) The area of the white piece of paper is 4π square inches.
r=2
d=4=side of the square

sufficient

D
Re: The figure above represents a red square piece of paper with a white c &nbs [#permalink] 05 Sep 2018, 00:45
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