GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 17 Jun 2018, 21:09

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

Find the length of the rectangle?

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

Hide Tags

Senior Manager
Senior Manager
User avatar
D
Joined: 02 Jan 2017
Posts: 314
Location: Canada
Reviews Badge
Find the length of the rectangle? [#permalink]

Show Tags

New post 14 Mar 2017, 08:55
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

100% (00:18) correct 0% (00:00) wrong based on 27 sessions

HideShow timer Statistics

Find the length of the rectangle?

(1) The perimeter of the rectangle is 120

(2) The width of the rectangle is 20
Expert Post
1 KUDOS received
Magoosh GMAT Instructor
User avatar
G
Joined: 28 Dec 2011
Posts: 4668
Find the length of the rectangle? [#permalink]

Show Tags

New post 14 Mar 2017, 12:21
1
vikasp99 wrote:
Find the length of the rectangle?

(1) The perimeter of the rectangle is 120

(2) The width of the rectangle is 20

Dear vikasp99,

I'm happy to respond. :-)

This question is is far too easy to be on the GMAT. This is a essentially a low-level practice questions, for people reviewing the basics before they are ready for GMAT math.

Perimeter of a rectangle = 2*L + 2*W

If we know both the perimeter and the width, we can calculate the length very easily.

OA = (C)

Here are some more GMAT-like DS practice questions on geometry:
GMAT Data Sufficiency Geometry Practice Questions

Does all this make sense?
Mike :-)
_________________

Mike McGarry
Magoosh Test Prep

Image

Image

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Expert Post
Math Revolution GMAT Instructor
User avatar
D
Joined: 16 Aug 2015
Posts: 5572
GMAT 1: 800 Q59 V59
GPA: 3.82
Find the length of the rectangle? [#permalink]

Show Tags

New post 14 Mar 2017, 16:22
vikasp99 wrote:
Find the length of the rectangle?

(1) The perimeter of the rectangle is 120

(2) The width of the rectangle is 20


This question is about a length \(l\) and a width \(w\) from the below conditions.
There are two variables and no equation.
Hence C is most likely the correct answer.

The question is what is the value of \(l\).

Condition 1) : \(2(l+w) = 120\).
Condition 2) : \(w = 20\)

For the condition 1), it is clearly not sufficient, since we don't know anything about \(w\). Hence, we can not get a value of \(l\).

For the condition 2), the given equation does not any clue for the variable \(l\).

For both the conditions 1) and 2) together, \(w = 20\) and so \(2(l+w) = 2(l+20) = 2l + 40 = 120 or 2l = 80\).
Hence, \(l = 40\).
Therefore, both conditions together, they are sufficient.

The correct answer is C
_________________

MathRevolution: Finish GMAT Quant Section with 10 minutes to spare
The one-and-only World’s First Variable Approach for DS and IVY Approach for PS with ease, speed and accuracy.
"Only $79 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"

Senior Manager
Senior Manager
avatar
B
Joined: 05 Jan 2017
Posts: 427
Location: India
Premium Member
Re: Find the length of the rectangle? [#permalink]

Show Tags

New post 15 Mar 2017, 02:42
the the length be l an width be b

St 1: 2(l+b) = 120. two variable, one equation. INSUFFICIENT
St 2: b = 20. No idea about l. INSUFFICIENT

St 1 & St 2: two variable, two equation. SUFFICIENT

Option C
Re: Find the length of the rectangle?   [#permalink] 15 Mar 2017, 02:42
Display posts from previous: Sort by

Find the length of the rectangle?

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


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.