GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 20 Jan 2020, 22:27

### 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

# Rectangular Floors X and Y have equal area. If Floor X is 12

Author Message
TAGS:

### Hide Tags

Math Expert
Joined: 02 Sep 2009
Posts: 60515
Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

23 Jul 2012, 04:22
3
4
00:00

Difficulty:

5% (low)

Question Stats:

96% (00:45) correct 4% (01:30) wrong based on 1277 sessions

### HideShow timer Statistics

Rectangular Floors X and Y have equal area. If Floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, what is the length of Floor Y, in feet?

(A) 13 1/2
(B) 18
(C) 18 3/4
(D) 21
(E) 24

Practice Questions
Question: 3
Page: 152
Difficulty: 550

_________________
Math Expert
Joined: 02 Sep 2009
Posts: 60515
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

23 Jul 2012, 04:22
1
SOLUTION

Rectangular Floors X and Y have equal area. If Floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, what is the length of Floor Y, in feet?

(A) 13 1/2
(B) 18
(C) 18 3/4
(D) 21
(E) 24

Given: $$area=12*18=9*length$$, thus $$length=12*2=24$$.

_________________
Intern
Joined: 21 Sep 2010
Posts: 5
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

23 Jul 2012, 12:13
1
E.) 24

Floor X has an area equivalent to 12 x 18 which simplifies into 2 x 6 x 9 x 2. Floor Y has the same area and we know one side is 9 feet. Simply dividing Floor X's area (2 x 6 x 9 x 2) by 9 will yield the length of the other side of Floor Y (24 or 2 x 6 x 2).
Math Expert
Joined: 02 Sep 2009
Posts: 60515
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

27 Jul 2012, 06:49
SOLUTION

Rectangular Floors X and Y have equal area. If Floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, what is the length of Floor Y, in feet?

(A) 13 1/2
(B) 18
(C) 18 3/4
(D) 21
(E) 24

Given: $$area=12*18=9*length$$, thus $$length=12*2=24$$.

_________________
Senior Manager
Status: Gonna rock this time!!!
Joined: 22 Jul 2012
Posts: 418
Location: India
GMAT 1: 640 Q43 V34
GMAT 2: 630 Q47 V29
WE: Information Technology (Computer Software)
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

26 Oct 2012, 02:45
I doubt if the difficulty level is 550 :D

it must be 350.. 18 secs it took. .
_________________
hope is a good thing, maybe the best of things. And no good thing ever dies.

Who says you need a 700 ?Check this out : http://gmatclub.com/forum/who-says-you-need-a-149706.html#p1201595

My GMAT Journey : http://gmatclub.com/forum/end-of-my-gmat-journey-149328.html#p1197992
Intern
Joined: 04 Apr 2013
Posts: 30
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

12 Apr 2013, 08:47
3
We can avoid lengthy math here due to the handout the question has given us. 12 x 18 for me at least would take some time to work out. Lucky for us the GMAT writers are aware of this and gave one side of the other rectangle as 9. We have an easy comparison here. 9 is 1/2 of 18. In order for their areas to be equal then we must double 12 which becomes 24. These tricks will help you use comparison to solve it in under 20 seconds.
Intern
Joined: 01 Feb 2013
Posts: 9
Location: United States
Concentration: Finance, Technology
GPA: 3
WE: Analyst (Computer Software)
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

12 Apr 2013, 11:06
Sachin9 wrote:
I doubt if the difficulty level is 550 :D

it must be 350.. 18 secs it took. .

I think it's because it can be easy to make a really silly mistake, and not pay 100% attention to the question (Like with every question)
Manager
Status: Looking to improve
Joined: 15 Jan 2013
Posts: 144
GMAT 1: 530 Q43 V20
GMAT 2: 560 Q42 V25
GMAT 3: 650 Q48 V31
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

12 Apr 2013, 14:53
These are trap questions which can bring your score way down if one is careless.
Manager
Joined: 25 Mar 2013
Posts: 222
Location: United States
Concentration: Entrepreneurship, Marketing
GPA: 3.5
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

30 Jun 2014, 22:24
1
Just imagined x and y floors are equal in area. So x = y
As area = lb
12*18=9*x
x = 24
SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1725
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

02 Jul 2014, 02:38
Area x = Area Y

12 * 18 = 9 * l

$$l = 12 * \frac{18}{9} = 24$$

Manager
Joined: 07 Apr 2014
Posts: 98
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

09 Sep 2014, 10:54
Bunuel wrote:
Rectangular Floors X and Y have equal area. If Floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, what is the length of Floor Y, in feet?

(A) 13 1/2
(B) 18
(C) 18 3/4
(D) 21
(E) 24

Practice Questions
Question: 3
Page: 152
Difficulty: 550

Always pretty nervous while taking word problems But i got this one..

12*18=216

216/9 = 24
Manager
Joined: 10 Apr 2016
Posts: 54
Concentration: Strategy, Entrepreneurship
GMAT 1: 520 Q29 V30
GPA: 3.01
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

19 Apr 2016, 11:05
area x equals area y
12 times 18 is 216m
216 divided by the width of y equals the length of y, which is 24.
_________________
Took the Gmat and got a 520 after studying for 3 weeks with a fulltime job. Now taking it again, but with 6 weeks of prep time and a part time job. Studying every day is key, try to do at least 5 exercises a day.
Senior Manager
Joined: 24 Nov 2015
Posts: 475
Location: United States (LA)
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

26 Apr 2016, 14:06
Area of rectangle X = Area of rectangle Y
12 * 18 = 9 * length of Y
length of Y = 24 feet
correct option - E
Target Test Prep Representative
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 9066
Location: United States (CA)
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

02 May 2016, 09:15
Bunuel wrote:
Rectangular Floors X and Y have equal area. If Floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, what is the length of Floor Y, in feet?

(A) 13 1/2
(B) 18
(C) 18 3/4
(D) 21
(E) 24

Practice Questions
Question: 3
Page: 152
Difficulty: 550

The area of a rectangle is: Area = length x width

We are given that floor X is 12 feet by 18 feet and that floor Y is 9 feet wide. So we can say:

length of X = 12

width of X = 18

width of Y = 9

length of Y = n

We also can say:

Area of Floor X = Area of Floor Y

(length of X)(width of X) = (length of Y)(width of Y)

(12)(18) = 9n

(12)(2) = n

24 = n

_________________

# Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
181 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

Intern
Joined: 20 Oct 2015
Posts: 36
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

05 Jul 2016, 03:56
Bunuel wrote:
Rectangular Floors X and Y have equal area. If Floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, what is the length of Floor Y, in feet?

(A) 13 1/2
(B) 18
(C) 18 3/4
(D) 21
(E) 24

Practice Questions
Question: 3
Page: 152
Difficulty: 550

12*18=9*x

12*9*2=9*x

12*2=x
Intern
Joined: 03 Aug 2016
Posts: 40
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

09 Apr 2018, 12:04
Bunuel wrote:
Rectangular Floors X and Y have equal area. If Floor X is 12 feet by 18 feet and Floor Y is 9 feet wide, what is the length of Floor Y, in feet?

(A) 13 1/2
(B) 18
(C) 18 3/4
(D) 21
(E) 24

Practice Questions
Question: 3
Page: 152
Difficulty: 550

Looks like I took the long route to finding out the answer!

Area of the rectangular floor X = L*W --> 12*18 = 216

Area of the rectangular floor Y = L*W --> Y = length * 9

We're given that the areas of floor X and Y are equal --> 216 = length * 9 --> length = 216/9 = 24 --> option E
Non-Human User
Joined: 09 Sep 2013
Posts: 13990
Re: Rectangular Floors X and Y have equal area. If Floor X is 12  [#permalink]

### Show Tags

13 Sep 2019, 05:13
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Rectangular Floors X and Y have equal area. If Floor X is 12   [#permalink] 13 Sep 2019, 05:13
Display posts from previous: Sort by