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

It is currently 07 Jul 2020, 11:55

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

The length of a rectangle is twice its width. If the length is decreas

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

Hide Tags

Find Similar Topics 
Manager
Manager
User avatar
G
Joined: 24 Feb 2020
Posts: 165
Location: Italy
WE: Analyst (Investment Banking)
The length of a rectangle is twice its width. If the length is decreas  [#permalink]

Show Tags

New post 29 May 2020, 09:08
00:00
A
B
C
D
E

Difficulty:

  45% (medium)

Question Stats:

56% (01:23) correct 44% (01:50) wrong based on 25 sessions

HideShow timer Statistics

The length of a rectangle is twice its width. If the length is decreased by 20% and the width is increased by 20%, by what percent is the area decreased?

(A) 2
(B) 4
(C) 8
(D) 12
(E) 20
GMAT Club Legend
GMAT Club Legend
User avatar
V
Status: GMATINSIGHT Tutor
Joined: 08 Jul 2010
Posts: 4330
Location: India
GMAT: QUANT EXPERT
Schools: IIM (A)
GMAT 1: 750 Q51 V41
WE: Education (Education)
Reviews Badge
Re: The length of a rectangle is twice its width. If the length is decreas  [#permalink]

Show Tags

New post 29 May 2020, 09:31
Ravixxx wrote:
The length of a rectangle is twice its width. If the length is decreased by 20% and the width is increased by 20%, by what percent is the area decreased?

(A) 2
(B) 4
(C) 8
(D) 12
(E) 20


Let, Width = 10
then Length = 2*10 = 20
Area = 10*20

New Length = 20-20% of 20 = 0.8*20
New width = 10+20% of 10 = 1.2*10
New Area = (1.2*10)*(0.8*20) = 0.96*(10*20)

i.e. Decrease % = (1-0.96)*100/1 = 4%

Answer: Option B
_________________
Prepare with PERFECTION to claim Q≥50 and V≥40 !!!
GMATinsight .............(Bhoopendra Singh and Dr.Sushma Jha)
e-mail: info@GMATinsight.com l Call : +91-9999687183 / 9891333772
One-on-One Skype classes l Classroom Coaching l On-demand Quant course l Admissions Consulting

Most affordable l Comprehensive l 2000+ Qn ALL with Video explanations l LINK: Courses and Pricing
Click for FREE Demo on VERBAL & QUANT
Our SUCCESS STORIES: From 620 to 760 l Q-42 to Q-49 in 40 days l 590 to 710 + Wharton l
FREE GMAT Resource: 22 FREE (FULL LENGTH) GMAT CATs LINKS l NEW OG QUANT 50 Qn+VIDEO Sol.
GMAT Club Bot
Re: The length of a rectangle is twice its width. If the length is decreas   [#permalink] 29 May 2020, 09:31

The length of a rectangle is twice its width. If the length is decreas

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





cron

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