Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 29 Jun 2015, 22:06

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# Working alone at its own constant rate, a machine seals k

 Question banks Downloads My Bookmarks Reviews Important topics
Author Message
TAGS:
Manager
Joined: 19 Apr 2006
Posts: 231
Followers: 1

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

Working alone at its own constant rate, a machine seals k [#permalink]  28 May 2006, 18:52
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
1.Working alone at its own constant rate, a machine seals k cartons in 8hrs, and working alone at its own constant rate, a second machine seals k cartons in 4hrs. If the two machines, each working at its own constant rate and for the same period of time, together sealed a certain number of cartons, what percent of the cartons were sealed by the machine working at the faster rate?

A)25%
B)33.33%
C)50%
D)66.66%
E)75%

2.A certain business produced x rakes each month from November through February and shipped x/2 rakes at the beginning of each month from March through October. The business paid no storage costs for the rakes from November through February, but it paid storage cost of \$0.10 per rake each month from March through October for the rakes that had not been shipped. In terms of x, what was the total storage cost, in dollars, that the business paid for the rakes fro the 12 months from November through October?

A)0.40x
B)1.20x
C)1.40x
D)1.60x
E)3.20x

Please include explanations...
Manager
Joined: 17 Jan 2006
Posts: 92
Followers: 1

Kudos [?]: 5 [0], given: 0

[#permalink]  28 May 2006, 19:29
q1:
plug in some numbers
say Say k =40

1st machine 40 cartons in 8 hours
= 20 cartons in 4 hours

2nd machine 40 cartons in 4 hours

Both machines 60 cartons in 4hours
percent of the cartons were sealed by the machine working at the faster rate?
40/(40+20) * 100

=66.66%
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5068
Location: Singapore
Followers: 23

Kudos [?]: 192 [0], given: 0

[#permalink]  28 May 2006, 20:35
Machine A --> seal k cartons in 8 hours; 1 hour seal k/8 cartons
Machine B --> seal k cartons in 4 hours; 1 hour seal k/4 cartons

Together, they seal 3k/8 cartons in 1 hour.
% sealed by the faster machine = (k/4)/(3k/8) * 100 = (k/4)(8/3k)*100 = 66.67%
GMAT Club Legend
Joined: 07 Jul 2004
Posts: 5068
Location: Singapore
Followers: 23

Kudos [?]: 192 [0], given: 0

[#permalink]  28 May 2006, 20:40
Nov - Feb --> 4 months. Each month produce x rakes.
Mar - Oct --> 8 months. Each month ship x/2 rakes.

Total rakes produces = 4x
March --3.5x(0.1)
April --3x(0.1)
May -- 2.5x(0.1)
June -- 2x(0.1)
July -- 1.5x(0.1)
Aug -- 1x(0.1)
Sep -- 0.5x(0.1)
Oct -- No charge

Total = 0.1x(3.5+3+2.5+2+1.5+1+0.5) = 1.4x
Manager
Joined: 19 Apr 2006
Posts: 231
Followers: 1

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

[#permalink]  29 May 2006, 07:14
OA:
question 1: 66.66%
question 2: 1.40x

ywilfred,
Thanks for all the explanations. You are very good. I looked at it and looked at it and could not make heads or tails...
[#permalink] 29 May 2006, 07:14
Similar topics Replies Last post
Similar
Topics:
9 Working alone at its constant rate, machine K took 3 hours 8 29 Nov 2012, 21:44
22 Working alone at its own constant rate, a machine seals k 16 17 Nov 2010, 07:35
6 Working alone at its own constant rate, a machine seals k 16 13 Oct 2009, 11:13
Working alone at its own constant rate, a machine seals k 2 11 Dec 2007, 05:13
Working alone at its own constant rate, a machine seals k 5 10 Jun 2007, 00:15
Display posts from previous: Sort by

# Working alone at its own constant rate, a machine seals k

 Question banks Downloads My Bookmarks Reviews Important topics

 Powered by phpBB © phpBB Group and phpBB SEO Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.