Last visit was: 24 Apr 2026, 11:41 It is currently 24 Apr 2026, 11:41
Home
Messages
Tests
Schools
Events
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.
Go to My Error Log Learn more
Close
Request Expert Reply
Confirm Cancel
Back to Forum
Create Topic
User avatar
BrentGMATPrepNow
User avatar
Major Poster
Joined: 12 Sep 2015
Last visit: 31 Oct 2025
Posts: 6,733
Own Kudos:
36,457
 [2]
Given Kudos: 799
Location: Canada
Expert
Expert reply
Posts: 6,733
Kudos: 36,457
 [2]
Barrel A and barrel B have a combined capacity of 360 liters. If barre 18 Jun 2021, 06:21
1
Kudos
Add Kudos
1
Bookmarks
Bookmark this Post
00:00
Start Timer
Pause Timer
Resume Timer
Show Answer
Hide
Show
History
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

Difficulty:

5% (low)

Question Stats:

92% (00:55) correct 8% (01:12) wrong based on 89 sessions

History

Date
Time
Result
Not Attempted Yet
Barrel A and barrel B have a combined capacity of 360 liters. If barrel B's capacity is 30 liters greater than twice barrel A's capacity, what is the capacity of barrel A?

A) 90
B) 110
C) 120
D) 130
E) 165

Aside: There are several ways to solve this question. See how many different solutions you can find.
ShowHide Answer
Official Answer
B
Drill more questions that test the same idea in GMAT Club Timed Quiz → Free.
User avatar
IanStewart
User avatar
GMAT Tutor
Joined: 24 Jun 2008
Last visit: 24 Apr 2026
Posts: 4,143
Own Kudos:
11,278
 [2]
Given Kudos: 99
Expert
Expert reply
Posts: 4,143
Kudos: 11,278
 [2]
Barrel A and barrel B have a combined capacity of 360 liters. If barre 18 Jun 2021, 07:21
2
Kudos
Add Kudos
Bookmarks
Bookmark this Post
We know B can hold 30 more than twice what A can hold, and together they hold 360 liters. So if we take out that extra 30 liters, together they'd hold 330 liters, and B now holds exactly twice as much as A, so A holds 1/3 of the total of 330, and A holds 110 liters.

Naturally there are algebraic approaches, or as a last resort, backsolving from answer choices would work.
User avatar
ShahadatHJ
User avatar
Joined: 14 Aug 2019
Last visit: 19 Apr 2026
Posts: 155
Own Kudos:
131
 [1]
Given Kudos: 256
Location: Bangladesh
GPA: 3.41
Posts: 155
Kudos: 131
 [1]
Barrel A and barrel B have a combined capacity of 360 liters. If barre 18 Jun 2021, 08:10
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Since,
A+B = 360

Let's assume,
A = X
Then, B = 2X+30

ATQ,
X+2X+30 = 360
X = 110

Hence, A holds 110 Litres.
User avatar
BrentGMATPrepNow
User avatar
Major Poster
Joined: 12 Sep 2015
Last visit: 31 Oct 2025
Posts: 6,733
Own Kudos:
36,457
 [1]
Given Kudos: 799
Location: Canada
Expert
Expert reply
Posts: 6,733
Kudos: 36,457
 [1]
Barrel A and barrel B have a combined capacity of 360 liters. If barre 19 Jun 2021, 06:43
1
Kudos
Add Kudos
Bookmarks
Bookmark this Post
BrentGMATPrepNow
Barrel A and barrel B have a combined capacity of 360 liters. If barrel B's capacity is 30 liters greater than twice barrel A's capacity, what is the capacity of barrel A?

A) 90
B) 110
C) 120
D) 130
E) 165

Aside: There are several ways to solve this question. See how many different solutions you can find.
Show more

APPROACH #1: Test the answer choices

A) 90
If barrel A holds 90 liters, then barrel B's capacity = 2(90) + 30 = 210 (since we're told B's capacity is 30 liters greater than twice A's capacity)
So, barrel B holds 210 liters, which means their COMBINED capacity = 90 + 210 = 300 liters.
So, answer choice A is wrong since we're told their combined capacity is 360 liters.

B) 110
If barrel A holds 110 liters, then barrel B's capacity = 2(110) + 30 = 240 (since we're told B's capacity is 30 liters greater than twice A's capacity)
So, barrel B holds 250 liters, which means their COMBINED capacity = 110 + 250 = 360 liters.
Bingo!
Answer: B


APPROACH #2: 1 variable
Let x = barrel A's capacity (I chose this quantity since the questions is explicitly asking for this value)
So, 360 - x = barrel B's capacity (since the two barrels have a combined capacity of 360 liters)

If barrel B's capacity is 30 liters greater than twice barrel A's capacity, we can write: 360 - x = 2x + 30
Add x to both sides: 360 = 3x + 30
Subtract 30 from both sides: 330 = 3x
Solve: x = 110
Answer: B


APPROACH #3: 2 variables
Let A = barrel A's capacity
Let B = barrel B's capacity
Since they have a combined capacity of 360 liters, we can write: A + B = 360
Since barrel B's capacity is 30 liters greater than twice barrel A's capacity, we can write: B = 2A + 30

We now have the following system of equations:
A + B = 360
B = 2A + 30

Solve for A to get: A = 110
Answer: B
User avatar
bumpbot
User avatar
Non-Human User
Joined: 09 Sep 2013
Last visit: 04 Jan 2021
Posts: 38,974
Own Kudos:
1,117
Posts: 38,974
Kudos: 1,117
Barrel A and barrel B have a combined capacity of 360 liters. If barre 09 May 2024, 04:26
Kudos
Add Kudos
Bookmarks
Bookmark this Post
Automated notice from GMAT Club BumpBot:

A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.

This post was generated automatically.
Moderators:
Bunuel
Math Expert
109816 posts
Krunaal
Tuck School Moderator
853 posts