|
Author |
Message |
|
TAGS:
|
|
|
Manager
Joined: 05 Sep 2007
Posts: 148
Location: New York
Followers: 1
Kudos [?]:
4
[0], given: 0
|
How many bags of grass seed were used for rectangular lawn X [#permalink]
 27 Jan 2008, 13:57
Question Stats:
0% (00:00) correct
 0% (00:00) wrong based on 0 sessions
Please help:
How many bags of grass seed were used for rectangular lawn X?
1. Lawn X has a perimeter of 720 feet.
2. One bag of grass seed was used for each 5000 sq. feet of lawn X.
|
|
|
|
|
|
|
CEO
Joined: 17 Nov 2007
Posts: 3591
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 230
Kudos [?]:
1298
[0], given: 346
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 14:15
E1&2. Area of rectangular lawn X is (0,(720/4)^2]=(0,32400]The number of bags is [1,7]insuff. if perimeter of the lawn were 240, the answer would be C. It would be very tricky question 
_________________
iPhone/iPod/iPad: GMAT ToolKit - The bestselling GMAT prep app | GMAT Club (free) | PrepGame | GRE ToolKit | LSAT ToolKit
Android: GMAT ToolKit (NEW!). POLL: What tool do you need next?
Math: GMAT Math Book ||| General: GMATTimer ||| Chicago Booth: Slide Presentation
The People Who Are Crazy Enough to Think They Can Change the World, Are the Ones Who Do.
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Senior Manager
Joined: 20 Dec 2004
Posts: 268
Followers: 6
Kudos [?]:
43
[0], given: 0
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 14:18
Walker - I agree with E. But one of your assumptions here is tht the lawn is a square which it is not. L + B = 360. (720/2). Area of LB has a multitude of combinations and hence E.
_________________
Stay Hungry, Stay Foolish
|
|
|
|
|
|
CEO
Joined: 17 Nov 2007
Posts: 3591
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 230
Kudos [?]:
1298
[0], given: 346
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 14:27
at the constant perimeter, area of rectangle lawn is minimum: rectangle is very narrow and Area --> 0 maximum: rectangle is a square --> 720=4a --> a=180 --> area=180^2=32400 Therefore area of lawn is in the range (0,32400]
_________________
iPhone/iPod/iPad: GMAT ToolKit - The bestselling GMAT prep app | GMAT Club (free) | PrepGame | GRE ToolKit | LSAT ToolKit
Android: GMAT ToolKit (NEW!). POLL: What tool do you need next?
Math: GMAT Math Book ||| General: GMATTimer ||| Chicago Booth: Slide Presentation
The People Who Are Crazy Enough to Think They Can Change the World, Are the Ones Who Do.
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
Senior Manager
Joined: 20 Dec 2004
Posts: 268
Followers: 6
Kudos [?]:
43
[0], given: 0
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 14:30
Got it. I agree that the question would have been very tricky if perimeter was 240...
_________________
Stay Hungry, Stay Foolish
|
|
|
|
|
|
CEO
Joined: 17 Nov 2007
Posts: 3591
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 230
Kudos [?]:
1298
[0], given: 346
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 14:33
neelesh wrote: Got it.
I agree that the question would have been very tricky if perimeter was 240... May even 800-level  
_________________
iPhone/iPod/iPad: GMAT ToolKit - The bestselling GMAT prep app | GMAT Club (free) | PrepGame | GRE ToolKit | LSAT ToolKit
Android: GMAT ToolKit (NEW!). POLL: What tool do you need next?
Math: GMAT Math Book ||| General: GMATTimer ||| Chicago Booth: Slide Presentation
The People Who Are Crazy Enough to Think They Can Change the World, Are the Ones Who Do.
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
CEO
Joined: 29 Mar 2007
Posts: 2618
Followers: 13
Kudos [?]:
142
[0], given: 0
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 23:05
walker wrote: E1&2. Area of rectangular lawn X is (0,(720/4)^2]=(0,32400]The number of bags is [1,7]insuff. if perimeter of the lawn were 240, the answer would be C. It would be very tricky question Agree E. Yes that would be very interesting w/ a perimeter of 240.
|
|
|
|
|
|
SVP
Joined: 04 May 2006
Posts: 1946
Schools: CBS, Kellogg
Followers: 10
Kudos [?]:
168
[0], given: 1
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 23:18
walker wrote: at the constant perimeter, area of rectangle lawn is
minimum: rectangle is very narrow and Area --> 0
maximum: rectangle is a square --> 720=4a --> a=180 --> area=180^2=32400
Therefore area of lawn is in the range (0,32400] Walker, if so I think number of bags of seed also lines in the range of (0, 6...) that is why E
_________________
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
CEO
Joined: 17 Nov 2007
Posts: 3591
Concentration: Entrepreneurship, Other
Schools: Chicago (Booth) - Class of 2011
GMAT 1: 750 Q50 V40
Followers: 230
Kudos [?]:
1298
[0], given: 346
|
Re: DS:bags of grass [#permalink]
27 Jan 2008, 23:23
sondenso wrote: Walker, if so I think number of bags of seed also lines in the range of (0, 6...) that is why E Yeah, but [1,7]. 6 bags are not enough to use for the square lawn X.
_________________
iPhone/iPod/iPad: GMAT ToolKit - The bestselling GMAT prep app | GMAT Club (free) | PrepGame | GRE ToolKit | LSAT ToolKit
Android: GMAT ToolKit (NEW!). POLL: What tool do you need next?
Math: GMAT Math Book ||| General: GMATTimer ||| Chicago Booth: Slide Presentation
The People Who Are Crazy Enough to Think They Can Change the World, Are the Ones Who Do.
Find out what's new at GMAT Club - latest features and updates
|
|
|
|
|
|
|
Re: DS:bags of grass
[#permalink]
27 Jan 2008, 23:23
|
|
|
|
|
|
|
|
|
|
|
close
