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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
89% (00:44) correct
11%
(00:50)
wrong
based on 77
sessions
History
Date
Time
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Not Attempted Yet
Attachment:
brick.png [ 4.54 KiB | Viewed 3337 times ]
(1) The radius of the semicircle described by arc AB is 4.
(2) The perimeter of the square ABCD is 32.
21 Aug 2013, 19:52
Kudos
Bookmarks
Asifpirlo
Both A and B alone are sufficient to answer.
22 Aug 2013, 02:36
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The figure above shows the shape of a brick patio. If arc AB is a semicircle and ABCD is a square, what is the perimeter of the patio?
The perimeter of the patio equals to the length of the semicircle plus the sum of the three sides of the square.
(1) The radius of the semicircle described by arc AB is 4. We can calculate the length of the semicircle. The side of the square is twice the radius. Sufficient.
(2) The perimeter of the square ABCD is 32 --> the side is 32/4=8. The radius is 8/2=4. Sufficient.
Answer: D.
Hope it's clear.
