GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 09 Dec 2019, 20:25

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.

Close

Request Expert Reply

Confirm Cancel

One pipe can fill a tank in 1 hour, while another pipe can fill the sa

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 59622
One pipe can fill a tank in 1 hour, while another pipe can fill the sa  [#permalink]

Show Tags

New post 20 Nov 2019, 01:15
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

88% (00:52) correct 12% (01:28) wrong based on 34 sessions

HideShow timer Statistics

GMAT Club Legend
GMAT Club Legend
User avatar
V
Joined: 18 Aug 2017
Posts: 5466
Location: India
Concentration: Sustainability, Marketing
GPA: 4
WE: Marketing (Energy and Utilities)
GMAT ToolKit User Premium Member
Re: One pipe can fill a tank in 1 hour, while another pipe can fill the sa  [#permalink]

Show Tags

New post 20 Nov 2019, 01:25
Bunuel wrote:
One pipe can fill a tank in 1 hour, while another pipe can fill the same tank in 2 hours. How long will it take to fill the tank if both pipes are used together?

A. 2/3 hour
B. 1/3 hour
C. 1 hour
D. 4/5 hour
E. 3/4 hour


ra=1/1
rb=1/2
together = 1/1+1/2 ; 3/2 time ; 2/3 hour
IMO A
Intern
Intern
avatar
B
Joined: 08 Jan 2019
Posts: 4
One pipe can fill a tank in 1 hour, while another pipe can fill the sa  [#permalink]

Show Tags

New post 21 Nov 2019, 06:50
P1 = 1 job in 1 hour = 1/1
p2 = 1 job in 2 hours= 1/2
2/2 + 1/2 = 3/2 time = 2/3 hours

IMO - A
Target Test Prep Representative
User avatar
V
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 8654
Location: United States (CA)
Re: One pipe can fill a tank in 1 hour, while another pipe can fill the sa  [#permalink]

Show Tags

New post 24 Nov 2019, 07:21
Bunuel wrote:
One pipe can fill a tank in 1 hour, while another pipe can fill the same tank in 2 hours. How long will it take to fill the tank if both pipes are used together?

A. 2/3 hour
B. 1/3 hour
C. 1 hour
D. 4/5 hour
E. 3/4 hour


The combined rate is:

1/1 + 1/2 = 2/2 + 1/2 = 3/2.

So the time would be job/rate = 1/(3/2) = 2/3.

Answer: A
_________________

Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
TTP - Target Test Prep Logo
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

GMAT Club Bot
Re: One pipe can fill a tank in 1 hour, while another pipe can fill the sa   [#permalink] 24 Nov 2019, 07:21
Display posts from previous: Sort by

One pipe can fill a tank in 1 hour, while another pipe can fill the sa

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne