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.
A certain plastic cup is manufactured by a robot. If 5 such
[#permalink]
18 Sep 2018, 04:24
18 Sep 2018, 04:24
1
Bookmarks
00:00
Question Stats:
60% (01:12) correct
39% (01:24) wrong based on 68 sessions
Hide Show timer Statistics
A certain plastic cup is manufactured by a robot. If 5 such robots, working at the same individual rate, can manufacture a combined total of 5 cups in 5 seconds, how many seconds will it take 25 robots to manufacture a total of 25 cups?
A) 25
B) 20
C) 15
D) 10
E) 5
A) 25
B) 20
C) 15
D) 10
E) 5
Re: A certain plastic cup is manufactured by a robot. If 5 such
[#permalink]
19 Sep 2018, 03:24
19 Sep 2018, 03:24
2
Since 5 Roberts can manufacture 5 cups in 5 seconds.
It must be that 25 Roberts should be able to manufacture 5 cups in 1 second.
Because as Roberts increase time taken to manufacture same number of cups decreases.
However we are required to find the time taken for 25 cups which is 5 times the original amount therefore it will take 5*1 sec = 5 seconds.
It must be that 25 Roberts should be able to manufacture 5 cups in 1 second.
Because as Roberts increase time taken to manufacture same number of cups decreases.
However we are required to find the time taken for 25 cups which is 5 times the original amount therefore it will take 5*1 sec = 5 seconds.
Attachments
roberts.png [ 2.02 KiB | Viewed 4995 times ]
Intern
Joined: 29 Aug 2018
Posts: 9
Given Kudos: 0
Location: India
GMAT 1: 720 Q50 V38
WE:Sales (Computer Software)
Re: A certain plastic cup is manufactured by a robot. If 5 such
[#permalink]
19 Sep 2018, 05:19
19 Sep 2018, 05:19
1
Think of it this was.
it takes 5 machines 5 second to make 5 cups, so their individual work rate must be 1 cup/5 sec (work= rate*time)
now they asked how much time will 25 robot take for 25 cups. we know the each robot makes 1 cup/5 sec. so it should take them 5 sec to make 25 cups.
it takes 5 machines 5 second to make 5 cups, so their individual work rate must be 1 cup/5 sec (work= rate*time)
now they asked how much time will 25 robot take for 25 cups. we know the each robot makes 1 cup/5 sec. so it should take them 5 sec to make 25 cups.
