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 →

At a speed of 50 miles per hour

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Master | Next Rank: 500 Posts
Posts: 335
Joined: Mon Mar 21, 2011 11:31 pmFollowed by: 2 members
Location: Australia / India
Thanked: 37 times
by melguy » Fri Jul 05, 2013 12:33 am
Please clarify my doubt with this problem. Thanks

What is did is
250 / 30 = 8.33

Then divided 8.33 / 12 (ignoring the .33). The closest answer is 2/3 but the OA is 25/36.
Attachments
Speed Problem.jpg
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 32
Joined: Tue Jun 25, 2013 2:56 am
Thanked: 4 times

by luckypiscian » Fri Jul 05, 2013 3:14 am
25/36 is a little more than 2/3
the approximation costed you

instead
250/30 * 1/12 = 25/36 :)
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 335
Joined: Mon Mar 21, 2011 11:31 pmFollowed by: 2 members
Location: Australia / India
Thanked: 37 times

by melguy » Fri Jul 05, 2013 4:23 am
Thanks. Can't believe it that the answer could be so sneaky! lol
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 490
Joined: Thu Jul 04, 2013 7:30 amFollowed by: 5 members
Location: Chennai, India
Thanked: 83 times

by Uva@90 » Sat Jul 06, 2013 6:25 am
Hi Melguy,
This is how u solved right?

If a car travels for 5 hours at 50 miles per hour, it could travel a distance of

d = 5*50 =250

if 30 miles consume 1 gallon then for 250 miles it take

250/30 = 25/3 gallons

25/3 is what fraction of 12 ?

25/3 = 12*X => So, x = 25/36.

Correct me if I am wrong.[/list]
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 335
Joined: Mon Mar 21, 2011 11:31 pmFollowed by: 2 members
Location: Australia / India
Thanked: 37 times

by melguy » Sat Jul 06, 2013 8:54 am
Hi Uva

Yes. You did it the right way.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Newbie | Next Rank: 10 Posts
Posts: 7
Joined: Tue Oct 16, 2012 11:44 am

by cazubuine » Sat Jul 06, 2013 4:57 pm
Forgive me, I am still not sure how you arrive at 25/36 :-(
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 490
Joined: Thu Jul 04, 2013 7:30 amFollowed by: 5 members
Location: Chennai, India
Thanked: 83 times

by Uva@90 » Sat Jul 06, 2013 7:30 pm
cazubuine wrote:Forgive me, I am still not sure how you arrive at 25/36 :-(
Which part you didn't get or the complete question itself ?
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
User avatar
Master | Next Rank: 500 Posts
Posts: 335
Joined: Mon Mar 21, 2011 11:31 pmFollowed by: 2 members
Location: Australia / India
Thanked: 37 times

by melguy » Sat Jul 06, 2013 8:08 pm
cazubuine wrote:Forgive me, I am still not sure how you arrive at 25/36 :-(

Car uses 1 gallon of has every 30 miles.
Car travelled for 5 hours at 50mph. So total = 5 x 50 = 250 miles

Amount of gas used = 250 / 30 or 25 / 3

Full tank was 12. So the amount used would be what fraction of the full tank? =

25
-----
3
---------
12
-----
1

Simplifying

25
-------
3 x 12
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
GMAT Instructor
Posts: 2630
Joined: Wed Sep 12, 2012 3:32 pmFollowed by: 119 members
Location: East Bay all the way
Thanked: 625 times
GMAT Score:780

by Matt@VeritasPrep » Tue Jul 09, 2013 4:11 pm
Another way to think about this:

If I use 1 gallon every 30 miles, my ratio of gas used to miles traveled is 1/30. So if I travel 250 miles, I start with this equation:

1/30 = x/250, or x = 25/3.

To get the fraction of a full tank, I just simplify

(25/3)/12

= (25/3) * (1/12)

= 25/36
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1