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

 It is currently 18 Jan 2019, 18:41

### 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

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

## Events & Promotions

###### Events & Promotions in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
• ### Free GMAT Strategy Webinar

January 19, 2019

January 19, 2019

07:00 AM PST

09:00 AM PST

Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.
• ### FREE Quant Workshop by e-GMAT!

January 20, 2019

January 20, 2019

07:00 AM PST

07:00 AM PST

Get personalized insights on how to achieve your Target Quant Score.

# Find the length of the rectangle?

Author Message
TAGS:

### Hide Tags

Senior Manager
Joined: 02 Jan 2017
Posts: 307
Find the length of the rectangle?  [#permalink]

### Show Tags

14 Mar 2017, 07:55
00:00

Difficulty:

15% (low)

Question Stats:

100% (00:30) correct 0% (00:00) wrong based on 28 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
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 4486
Find the length of the rectangle?  [#permalink]

### Show Tags

14 Mar 2017, 11:21
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

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

Math Revolution GMAT Instructor
Joined: 16 Aug 2015
Posts: 6815
GMAT 1: 760 Q51 V42
GPA: 3.82
Find the length of the rectangle?  [#permalink]

### Show Tags

14 Mar 2017, 15:22
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.

_________________

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 \$149 for 3 month Online Course"
"Free Resources-30 day online access & Diagnostic Test"
"Unlimited Access to over 120 free video lessons - try it yourself"

Director
Status: Come! Fall in Love with Learning!
Joined: 05 Jan 2017
Posts: 533
Location: India
Re: Find the length of the rectangle?  [#permalink]

### Show Tags

15 Mar 2017, 01:42
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
_________________

GMAT Mentors

Re: Find the length of the rectangle? &nbs [#permalink] 15 Mar 2017, 01:42
Display posts from previous: Sort by