Live GMAT classes with Target Test Prep start Nov 21 and Nov 22. First class free.

See classes
Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

★★★★★5.0563 reviews
GMATLiveTeachStarts Nov 22
Josh Braslow, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Josh Braslow, 20+ years in test prep

Nov 22 · Josh Braslow
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemandStart anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

EXECUTIVE ASSESSMENT

with

165+ EA score guarantee
$05-day trial no automatic billing
Schedule
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget Test Prep
GMATOnDemandStart anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 563 reviewsTarget Test Prep

PS

Expert replies
Post new topic Post Reply
Subscribe topic
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 112
Joined: Sun Jun 13, 2010 9:20 am
Thanked: 5 times
GMAT Score:640
by sunilrawat » Sat Jun 11, 2011 4:28 am
a rainstorm increased the amount of water from 124 bn gallons to 138 bn gallons. If storm increased the amount of water to 82% of the total capacity, approx how many bn gallons of water was the reservoir short of the total capacity prior to the storm.

a 9
b 14
c 25
d 30
e 44
Top
Join the discussion
Source: — Problem Solving |
Legendary Member
Posts: 1448
Joined: Tue May 17, 2011 9:55 amFollowed by: 53 members
Location: India
Thanked: 375 times

by Frankenstein » Sat Jun 11, 2011 4:41 am
Hi,
Let V be the total capacity of reservoir.
138 bn gallons is 82% of total capacity of reservoir.
So, (0.82)V = 138 => V =~ 168.
Initially volume of water is 124.
So, unfilled volume of reservoir is 168-124 = 44 bn gallons

Hence, E
Cheers!

Things are not what they appear to be... nor are they otherwise
Top
Join the discussion
User avatar
Master | Next Rank: 500 Posts
Posts: 436
Joined: Tue Feb 08, 2011 3:07 amFollowed by: 6 members
Thanked: 72 times

by manpsingh87 » Sat Jun 11, 2011 4:43 am
sunilrawat wrote:a rainstorm increased the amount of water from 124 bn gallons to 138 bn gallons. If storm increased the amount of water to 82% of the total capacity, approx how many bn gallons of water was the reservoir short of the total capacity prior to the storm.

a 9
b 14
c 25
d 30
e 44
let the capacity of reservoir be x. Therefore,
138=82%of x;
x=168 approx.
so before storm reservoir was 168-124=44 bn gallons of water short of its capacity.

hence E
O Excellence... my search for you is on... you can be far.. but not beyond my reach!
Top
Join the discussion
Master | Next Rank: 500 Posts
Posts: 112
Joined: Sun Jun 13, 2010 9:20 am
Thanked: 5 times
GMAT Score:640

by sunilrawat » Sat Jun 11, 2011 4:55 am
i solved it like this,

if 124 if x% of capacity (V)

0.82V = 138
0.01xV = 124

solving, we get x ~ 73%, i.e 27% short of V

then instead of calculating 27%of V, I marked 25 as the option...silly mistake
Top
Join the discussion
Legendary Member
Posts: 1309
Joined: Mon Apr 04, 2011 5:34 amFollowed by: 123 members
Location: India
Thanked: 310 times
GMAT Score:750

by cans » Tue Jun 14, 2011 3:28 am
82% of total=138
total=138*100/82 = 6900/41 = 168. something
thus remaining when 124 was filled = 168-124 = 44
IMO E
If my post helped you- let me know by pushing the thanks button ;)

Contact me about long distance tutoring!
[email protected]

Cans!!
Top
Join the discussion