BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem
TTP OnDemand GMAT Video Course
Featured Course

Target Test Prep GMAT OnDemand

Scott Woodbury-Stewart’s private virtual classroom — 400 hours of master-class video lessons for the GMAT Focus Edition.

  • 715+ score guarantee — highest in the industry (99th percentile)
  • 52 chapters · 1,500+ lessons · 4,000+ practice questions
  • 400 hours of video · 1,500+ instructor-led HD smartboard lessons
  • 300,000+ students accepted to Harvard, Stanford, Wharton, Booth & Sloan & more
  • 24/7 live support + weekly Zoom office hours with GMAT instructors
  • TTP AI Assist — 24/7 AI-powered virtual tutor for instant help
  • 1,200+ flashcards + AI-powered study assistant & daily calendar
  • OnDemand, LiveTeach & GMAT Bootcamp formats available
  • Also: GRE, SAT Math & Executive Assessment courses
  • MBA Admissions Consulting now available
  • 🏆 2025 EdTech Breakthrough Award: Test Prep Solution Provider of the Year
  • 200,000+ students served
  • 5-day free trial — $0 to start, no auto-billing, cancel anytime
★★★★★ 5.0 (559 reviews)
130-pt guarantee
$0 to start then $127/mo
Start Free 5-Day Trial Read 559 Reviews →

A certain rectangular window is twice as long as it is wide. If its perimeter...

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Moderator
Posts: 2647
Joined: Sun Oct 29, 2017 2:08 pmFollowed by: 2 members
by AAPL » Fri May 15, 2020 4:14 am

Timer

00:00

Answers

A

B

C

D

E

Stats

Difficulty—

Official Guide

A certain rectangular window is twice as long as it is wide. If its perimeter is 10 feet, then its dimensions in feet are

A. 3/2 by 7/2
B. 5/3 by 10/3
C. 2 by 4
D. 3 by 6
E. 10/3 by 20/3

OA B
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

Re: A certain rectangular window is twice as long as it is wide. If its perimeter...

by Brent@GMATPrepNow » Fri May 15, 2020 5:31 am
AAPL wrote: ↑
Fri May 15, 2020 4:14 am
 Official Guide

A certain rectangular window is twice as long as it is wide. If its perimeter is 10 feet, then its dimensions in feet are

A. 3/2 by 7/2
B. 5/3 by 10/3
C. 2 by 4
D. 3 by 6
E. 10/3 by 20/3

OA B
We COULD use algebra to solve this question.
However, it's probably faster to just test the answer choices

The answer choices give us the length and width of the rectangle.
So, the sum of two values will equal HALF the perimeter of the rectangle.
Since we want a perimeter of 10, the correct answer choice will have a sum of 5 ( HALF the perimeter)

(A) 3/2 by 7/2
3/2 + 7/2 = 10/2 = 5
Yay!!!
Hold on!
The question tells us the length is TWICE the width, yet 7/2 is NOT twice 3/2
ELIMINATE A

(B) 5/3 by 10/3
5/3 + 10/3 = 15/3 = 5. GREAT!
Also, 10/3 IS TWICE 5/3

Answer: B

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 16207
Joined: Mon Dec 08, 2008 6:26 pmFollowed by: 1268 members
Location: Vancouver, BC
Thanked: 5254 times
GMAT Score:770

Re: A certain rectangular window is twice as long as it is wide. If its perimeter...

by Brent@GMATPrepNow » Fri May 15, 2020 5:31 am
AAPL wrote: ↑
Fri May 15, 2020 4:14 am
 Official Guide

A certain rectangular window is twice as long as it is wide. If its perimeter is 10 feet, then its dimensions in feet are

A. 3/2 by 7/2
B. 5/3 by 10/3
C. 2 by 4
D. 3 by 6
E. 10/3 by 20/3

OA B
Approach #2: Algebra

Let x = the width of the rectangle
So, 2x = the length of the rectangle

If the perimeter is 10, we can write: x + x + 2x + 2x = 10
Simplify: 6x = 10
Solve: x = 10/6 = 5/3
So, the width (x) is 5/3
And the length (2x) is 10/3

Answer: B

Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
Image
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1