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Director
Joined: 05 May 2003
Posts: 560
Location: Aus
Followers: 2
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http://www.manhattangmat.com I am still working on this. [#permalink]
16 Feb 2004, 08:17
http://www.manhattangmat.com
I am still working on this. Will check back later.
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Director
Joined: 03 Jul 2003
Posts: 716
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I've got D
Not sure, if my approach is correct!
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Senior Manager
Joined: 11 Nov 2003
Posts: 361
Location: Illinois
Followers: 1
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The answer should be C.
The question: what is [(PI)R^2 - a] - [(pi)r^2 - a] = (pi)R^2 - (pi)r^2
= pi(R+r)(R-r) = ?
(a is the area of the overlapped portion)
Statement 1: R = r + 3k => R-r = 3k. We do not know the value of R+ r . So insuffecient.
Statement 2: will give the vale of R+r
Together: the answer would be 18(pi)
Answer C
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Director
Joined: 05 May 2003
Posts: 560
Location: Aus
Followers: 2
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Answer should be C.
gmatblast's method is easy to follow.
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SVP
Joined: 30 Oct 2003
Posts: 1963
Location: NewJersey USA
Followers: 3
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Yeah got the same.
C should be it.
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