Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa : GMAT Problem Solving (PS)
Check GMAT Club Decision Tracker for the Latest School Decision Releases http://gmatclub.com/AppTrack

 It is currently 20 Jan 2017, 07:45

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

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa

Author Message
TAGS:

Hide Tags

Intern
Joined: 24 Jan 2014
Posts: 10
Schools: SMU Singapore
Followers: 0

Kudos [?]: 18 [1] , given: 20

Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

08 Apr 2014, 07:30
1
KUDOS
4
This post was
BOOKMARKED
00:00

Difficulty:

95% (hard)

Question Stats:

17% (02:28) correct 83% (01:20) wrong based on 230 sessions

HideShow timer Statistics

Pipe A can fill a tank in 32 minutes. Pipe B can fill the same tank 6 times faster than pipe A. If both the pipes are connected to the tank so that they fill the tank simultaneously, how long will it take for the empty tank to overflow?

A. 4 minutes

B. 32/7 minutes

C. 192/7 minutes

E. 28 minutes
[Reveal] Spoiler: OA

Last edited by Bunuel on 08 Apr 2014, 07:42, edited 1 time in total.
RENAMED THE TOPIC.
Math Expert
Joined: 02 Sep 2009
Posts: 36582
Followers: 7086

Kudos [?]: 93249 [0], given: 10555

Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

08 Apr 2014, 07:56
Expert's post
2
This post was
BOOKMARKED
Safal wrote:
Pipe A can fill a tank in 32 minutes. Pipe B can fill the same tank 6 times faster than pipe A. If both the pipes are connected to the tank so that they fill the tank simultaneously, how long will it take for the empty tank to overflow?

A. 4 minutes

B. 32/7 minutes

C. 192/7 minutes

E. 28 minutes

Pipe A can fill a tank in 32 minutes --> the rate of A = 1/32 tank/minute;
Pipe B can fill the same tank 6 times faster than pipe A --> the rate of B = 1/32 + 6/32 = 7/32 tank/minute.

Their combined rate = 1/32 + 7/32 = 1/4 tank/minute;

Therefore, A and B can fill the tank in 4 minutes.

P.P.S Is this really a Veritas Prep question?

_________________
VP
Joined: 24 Jul 2011
Posts: 1126
GMAT 1: 780 Q51 V48
GRE 1: 1540 Q800 V740
Followers: 124

Kudos [?]: 540 [0], given: 19

Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

08 Apr 2014, 11:15
Time taken for the tank to overflow = 32/(7+1) = 4 minutes
[If pipe B can fill the tank 6 times faster than pipe A, it will fill the tank 7 times faster than pipe A]

Option (A)
_________________

GyanOne | Top MBA Rankings and MBA Admissions Blog

Premium MBA Essay Review|Best MBA Interview Preparation|Exclusive GMAT coaching

Get a FREE Detailed MBA Profile Evaluation | Call us now +91 98998 31738

SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1858
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)
Followers: 47

Kudos [?]: 1933 [0], given: 193

Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

08 Apr 2014, 20:10
Bunuel wrote:
Safal wrote:
Pipe A can fill a tank in 32 minutes. Pipe B can fill the same tank 6 times faster than pipe A. If both the pipes are connected to the tank so that they fill the tank simultaneously, how long will it take for the empty tank to overflow?

A. 4 minutes

B. 32/7 minutes

C. 192/7 minutes

E. 28 minutes

Pipe A can fill a tank in 32 minutes --> the rate of A = 1/32 tank/minute;
Pipe B can fill the same tank 6 times faster than pipe A --> the rate of B = 1/32 + 6/32 = 7/32 tank/minute.

Their combined rate = 1/32 + 7/32 = 1/4 tank/minute;

Therefore, A and B can fill the tank in 4 minutes.

P.P.S Is this really a Veritas Prep question?

I got it wrong here; I considered time 32/6 & proceeded.

Can you kindly elaborate as to why 6/32 + 1/32 was done?
_________________

Kindly press "+1 Kudos" to appreciate

Intern
Joined: 05 Apr 2014
Posts: 1
Followers: 0

Kudos [?]: 0 [0], given: 0

Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

09 Apr 2014, 01:24
Maybe I am missing something but the answer seems wrong:
Pipe A can fill 1/32 of the tank in 1 minute. Pipe B is 6 times faster, which means that it can fill 6/32 of the tank in 1 minute. Therefore, the two pipes fill 7/32 of the tank in a minute. If they need X minutes to fill the tank together, x*7/32=1; x=32/7. The answer is B.
Math Expert
Joined: 02 Sep 2009
Posts: 36582
Followers: 7086

Kudos [?]: 93249 [3] , given: 10555

Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

09 Apr 2014, 02:04
3
KUDOS
Expert's post
2
This post was
BOOKMARKED
TamunaP wrote:
Maybe I am missing something but the answer seems wrong:
Pipe A can fill 1/32 of the tank in 1 minute. Pipe B is 6 times faster, which means that it can fill 6/32 of the tank in 1 minute. Therefore, the two pipes fill 7/32 of the tank in a minute. If they need X minutes to fill the tank together, x*7/32=1; x=32/7. The answer is B.

There is subtle mathematical difference between "x is 6 times faster than y", which means x=y+6y=7y, and "x is 6 times as fast as y", which means x=6y.
_________________
Manager
Joined: 20 Dec 2013
Posts: 127
Followers: 10

Kudos [?]: 93 [0], given: 1

Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

09 Apr 2014, 02:15
Safal wrote:
Pipe A can fill a tank in 32 minutes. Pipe B can fill the same tank 6 times faster than pipe A. If both the pipes are connected to the tank so that they fill the tank simultaneously, how long will it take for the empty tank to overflow?

A. 4 minutes

B. 32/7 minutes

C. 192/7 minutes

E. 28 minutes

Let us say that the tank's capacity is 32 liters

Pipe A's rate = 1 liter per minute, Pipe B's rate = 6 liters per minute

Together their rate is 7 liters per minute

To fill 32 liters they will take 32/7 minutes to fill the tank and 32/8 for the tank to overflow
_________________

76000 Subscribers, 7 million minutes of learning delivered and 5.6 million video views

Perfect Scores
http://perfectscores.org

GMAT Club Legend
Joined: 09 Sep 2013
Posts: 13461
Followers: 575

Kudos [?]: 163 [0], given: 0

Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa [#permalink]

Show Tags

17 Mar 2016, 18:06
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________
Re: Pipe A can fill a tank in 32 minutes. Pipe B can fill the sa   [#permalink] 17 Mar 2016, 18:06
Similar topics Replies Last post
Similar
Topics:
4 Pipe A and B running together can fill a cistern in 6 minutes. If Pipe 5 12 Mar 2016, 07:15
25 Pipe A that can fill a tank in an hour and pipe B that can fill the 8 29 Aug 2014, 08:14
14 Pipe A can fill a tank in 3 hours. Pipe B can empty the same 5 27 May 2013, 02:16
32 Two pipes can fill a tank in 24 min and 32 min respectively. 16 18 Oct 2010, 19:34
12 Pipe A will fill a tank in 24 minutes and pipe B will fill t 6 29 Apr 2010, 12:07
Display posts from previous: Sort by