GRE Prep 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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2506
Given Kudos: 1055
GPA: 3.39
Working alone at its own constant rate, a machine seals k cartons in 8
[#permalink]
24 Sep 2022, 06:27
24 Sep 2022, 06:27
1
Expert Reply
00:00
Question Stats:
66% (00:54) correct
33% (03:08) wrong based on 3 sessions
Hide Show timer Statistics
Working alone at its own constant rate, a machine seals k cartons in 8 hours, and working alone at its own constant rate, a second machine seals k cartons in 4 hours. 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. \(33\frac{1}{3}\%\)
C. \(50\%\)
D. \(66\frac{2}{3}\%\)
E. \(75\%\)
A. \(25\%\)
B. \(33\frac{1}{3}\%\)
C. \(50\%\)
D. \(66\frac{2}{3}\%\)
E. \(75\%\)
Re: Working alone at its own constant rate, a machine seals k cartons in 8
[#permalink]
28 Sep 2022, 06:59
28 Sep 2022, 06:59
1
Expert Reply
No need for lengthy calculations: since the second one works twice as fast as the first, working together second will do 2/3 of the job (their ratio 1/2).
Answer: D.
Answer: D.
gmatclubot
Re: Working alone at its own constant rate, a machine seals k cartons in 8 [#permalink]
28 Sep 2022, 06:59
Moderators:
