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how many bags of grass seed were used for the rectangular

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Manager
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Joined: 05 Jul 2006
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how many bags of grass seed were used for the rectangular [#permalink] New post 07 Sep 2006, 05:12
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
how many bags of grass seed were used for the rectangular lawn X?

1. lawn X has a perimeter of 720 feet.
2. one bag of grass seed was used for each 5, 000 square feet of lawn X
CEO
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Joined: 20 Nov 2005
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Schools: Completed at SAID BUSINESS SCHOOL, OXFORD - Class of 2008
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GMAT Tests User
 [#permalink] New post 07 Sep 2006, 07:56
E

Let rectangle has dimensions x and y
St1: 2x+2y = 720, x+y = 360: INSUFF

St2: Clearly INSUFF

Together:
Min area could be very small. So 1 bag may be SUFF
Max area is when x= y = 180
Max area = 32400
Max bags needed = 7

So it could be anything from 1 to 7.

But if the perimeter is less than 280 then it is C.
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SAID BUSINESS SCHOOL, OXFORD - MBA CLASS OF 2008

VP
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 [#permalink] New post 07 Sep 2006, 08:01
Answer: E

S1: l+w = 360
Not Sufficient.

S2: Area covered/bag = 5000 sq. ft
Whats the area?
Not sufficient.

S1 & S2:
l+w = 360
l = 300 and w = 60 area = 18,000 sq ft.
l = 260 and w = 100 area = 26,000 sq ft.

Can have atleast two answers...

Not sufficient.

Answer: E
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 [#permalink] New post 07 Sep 2006, 09:43
WE CAN NEVER DETERMINE THE AREA OF A RECTANGLE FROM ITS PARAMETER

UNLESS A RELATION BETWEEN ITS lenght and width is given

thus my answer is E
  [#permalink] 07 Sep 2006, 09:43
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