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 machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
17 Aug 2018, 18:50
17 Aug 2018, 18:50
1
Expert Reply
2
Bookmarks
00:00
Question Stats:
85% (01:26) correct
14% (01:42) wrong based on 64 sessions
Hide Show timer Statistics
A machine can manufacture 20 cans per hour, and exactly 10 such cans fit into every box. Maria packs cans in boxes at a constant rate of 3 boxes per hour. If the machine ran for 2 hours and was then turned off before Maria started packing the cans in boxes, how many minutes would it take Maria to pack all the cans that the machine had made?
(A) 40
(B) 45
(C) 80
(D) 160
(E) 800
(A) 40
(B) 45
(C) 80
(D) 160
(E) 800
Re: A machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
18 Aug 2018, 00:19
18 Aug 2018, 00:19
1
machine manufactures at the rate of 20 cans per hr
In 2 hr machine m/f 40 cans
3 boxes = 30 cans.
There are total 40 cans to be packed
rate of maria = 30 cans per hr.
For 40 cans total time taken by maria = \(\frac{40}{30}\) hr = 80 mins
In 2 hr machine m/f 40 cans
3 boxes = 30 cans.
There are total 40 cans to be packed
rate of maria = 30 cans per hr.
For 40 cans total time taken by maria = \(\frac{40}{30}\) hr = 80 mins
Intern
Joined: 13 Jul 2018
Posts: 33
Given Kudos: 0
GRE 1: Q159 V151
GPA: 4
WE:Programming (Computer Software)
Re: A machine can manufacture 20 cans per hour, and exactly 10 s
[#permalink]
18 Aug 2018, 12:05
18 Aug 2018, 12:05
We just have to calculate Maria's rate of packing one box. That's 20 minutes.
So for 4 boxes in 2 hours (40 cans), it'll take 20*4=80.
So for 4 boxes in 2 hours (40 cans), it'll take 20*4=80.
