It is currently 21 Feb 2018, 13:05

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

The average length of all the sides of a rectangle equals twice the

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

1 KUDOS received
Retired Moderator
User avatar
P
Joined: 12 Aug 2015
Posts: 2423
GRE 1: 323 Q169 V154
GMAT ToolKit User Premium Member
The average length of all the sides of a rectangle equals twice the [#permalink]

Show Tags

New post 11 Apr 2017, 08:46
1
This post received
KUDOS
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

72% (02:01) correct 28% (01:59) wrong based on 58 sessions

HideShow timer Statistics

The average length of all the sides of a rectangle equals twice the width of the rectangle.If the area of the rectangle is 18,what is its perimeter?

A)6√6
B)8√6
C)24
D)32
E)48
[Reveal] Spoiler: OA

_________________


Getting into HOLLYWOOD with an MBA

Stone Cold's Mock Tests for GMAT-Quant(700+)

4 KUDOS received
Senior Manager
Senior Manager
User avatar
G
Joined: 19 Apr 2016
Posts: 275
Location: India
GMAT 1: 570 Q48 V22
GMAT 2: 640 Q49 V28
GPA: 3.5
WE: Web Development (Computer Software)
Re: The average length of all the sides of a rectangle equals twice the [#permalink]

Show Tags

New post 11 Apr 2017, 09:18
4
This post received
KUDOS
stonecold wrote:
The average length of all the sides of a rectangle equals twice the width of the rectangle.If the area of the rectangle is 18,what is its perimeter?

A)6√6
B)8√6
C)24
D)32
E)48


l*b = 18 -------- given

(2b+2l)/4 = 2b
6b = 2l
3b = l
3*18/l = l (using the given data)
\(l^2\) = 54
l = 3√6
therefore b = √6

perimeter = 2*(3√6+√6) = 8√6

Hence option B is correct
Hit Kudos if you liked it 8-)
VP
VP
avatar
P
Joined: 22 May 2016
Posts: 1338
Premium Member CAT Tests
The average length of all the sides of a rectangle equals twice the [#permalink]

Show Tags

New post 30 Apr 2017, 10:40
0akshay0 wrote:
stonecold wrote:
The average length of all the sides of a rectangle equals twice the width of the rectangle.If the area of the rectangle is 18,what is its perimeter?

A)6√6
B)8√6
C)24
D)32
E)48


l*b = 18 -------- given

(2b+2l)/4 = 2b
6b = 2l
3b = l
3*18/l = l (using the given data)
\(l^2\) = 54
l = 3√6
therefore b = √6

perimeter = 2*(3√6+√6) = 8√6

Hence option B is correct
Hit Kudos if you liked it 8-)


0akshay0 I have what might be a dumb question whose answer might be glaringly obvious, sorry! The prompt refers to the "average length of all sides."

When solving for area in this problem in order to get a side length, see highlight, how do we know that length equals side such that in the equation we can simply divide by L as you did?

I was tempted to do the same, but I was unsure about this issue. I solved the same way you did up to L=3W (your "b"). Then instead:

L*W = 18
3W*W = 18
W\(^2\) = 6
W= √6

Perimeter = 2W + 2L
= 2W + 2(3W)
= 2√6 + 6√6 = 8√6

I think the answer has something to do with weighted averages, but I have fog brain :?
_________________

At the still point, there the dance is. -- T.S. Eliot
Formerly genxer123

The average length of all the sides of a rectangle equals twice the   [#permalink] 30 Apr 2017, 10:40
Display posts from previous: Sort by

The average length of all the sides of a rectangle equals twice the

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.