It is currently 23 Mar 2019, 23:30

### 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

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

# Rates 1 problem-two machines work at a constant rate

Author Message
TAGS:
Intern
Joined: 15 Sep 2015
Posts: 3
Followers: 0

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

Rates 1 problem-two machines work at a constant rate [#permalink]  15 Sep 2015, 03:33
1
KUDOS
00:00

Question Stats:

58% (01:02) correct 41% (03:16) wrong based on 12 sessions
two machines work at a constant rate to produce bottles . machine A produces in 2/5 of an hour . machine B produces y bottles in 3/5 of an hour . which of the following combinations of machines can produce atleast 5y bottles in 2 hours.
Indicate all such statements
1. Machine A alone.
II. Machine B alone.
III. Both machines A and B

How to solve this problem. ?
[Reveal] Spoiler: OA
GRE Prep Club Legend
Joined: 07 Jun 2014
Posts: 4857
GRE 1: Q167 V156
WE: Business Development (Energy and Utilities)
Followers: 105

Kudos [?]: 1782 [1] , given: 397

Re: Rates 1 problem [#permalink]  17 Sep 2015, 06:25
1
KUDOS
Expert's post
Ayesha6194 wrote:
two machines work at a constant rate to produce bottles . machine A produces in 2/5 of an hour . machine B produces y bottles in 3/5 of an hour . which of the following combinations of machines can produce atleast 5y bottles in 2 hours.
Indicate all such statements
1. Machine A alone.
II. Machine B alone.
III. Both machines A and B

How to solve this problem. ?

You don't really need to solve this question because there are only three feasible combinations mentioned.

Machine A produces a bottle in $$\frac{2}{5}$$ hours. So in 2 hours it will 2 / $$\frac{2}{5}$$ = 5. I chose machine A first because it is faster of the two machines.

Hence to make more than 5 bottles you need more than Machine A so III is the only possible option.

The key words to focus on in this problem is "more than 5 bottles"
_________________

Sandy
If you found this post useful, please let me know by pressing the Kudos Button

Try our free Online GRE Test

Manager
Joined: 27 Sep 2017
Posts: 112
Followers: 1

Kudos [?]: 30 [0], given: 4

Re: Rates 1 problem [#permalink]  01 Mar 2018, 01:05
sandy wrote:
Ayesha6194 wrote:
two machines work at a constant rate to produce bottles . machine A produces in 2/5 of an hour . machine B produces y bottles in 3/5 of an hour . which of the following combinations of machines can produce atleast 5y bottles in 2 hours.
Indicate all such statements
1. Machine A alone.
II. Machine B alone.
III. Both machines A and B

How to solve this problem. ?

You don't really need to solve this question because there are only three feasible combinations mentioned.

Machine A produces a bottle in $$\frac{2}{5}$$ hours. So in 2 hours it will 2 / $$\frac{2}{5}$$ = 5. I chose machine A first because it is faster of the two machines.

Hence to make more than 5 bottles you need more than Machine A so III is the only possible option.

The key words to focus on in this problem is "more than 5 bottles"

The stem says "atleast 5y bottles in 2 hours" answer is A and C
Re: Rates 1 problem   [#permalink] 01 Mar 2018, 01:05
Display posts from previous: Sort by