GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 27 Jun 2019, 01:27

Close

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

If snow accumulation increased at a constant rate of 30 millimeters pe

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

 
Manager
Manager
avatar
B
Joined: 13 Sep 2016
Posts: 118
GMAT 1: 800 Q51 V51
If snow accumulation increased at a constant rate of 30 millimeters pe  [#permalink]

Show Tags

New post 09 May 2018, 03:34
3
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

72% (01:07) correct 28% (01:12) wrong based on 122 sessions

HideShow timer Statistics


If snow accumulation increased at a constant rate of 30 millimeters per hour during a certain snowstorm, how many seconds did it take for snow accumulation to increase by 1 millimeter?

a) 1/120
b) 1/60
c) 1/20
d) 20
e) 120
CEO
CEO
User avatar
V
Joined: 12 Sep 2015
Posts: 3787
Location: Canada
Re: If snow accumulation increased at a constant rate of 30 millimeters pe  [#permalink]

Show Tags

New post 09 May 2018, 07:08
1
Top Contributor
alanforde800Maximus wrote:
If snow accumulation increased at a constant rate of 30 millimeters per hour during a certain snowstorm, how many seconds did it take for snow accumulation to increase by 1 millimeter?

a) 1/120
b) 1/60
c) 1/20
d) 20
e) 120


Let's keep listing EQUIVALENT RATES until we get to 1 millimeter

30 millimeters per hour = 30 millimeters per 60 minutes
= 30 millimeters per 3600 SECONDS
= 3 millimeters per 360 SECONDS
= 1 millimeter per 120 SECONDS

Answer: E

Cheers,
Brent
_________________
Test confidently with gmatprepnow.com
Image
Senior SC Moderator
avatar
V
Joined: 22 May 2016
Posts: 2955
If snow accumulation increased at a constant rate of 30 millimeters pe  [#permalink]

Show Tags

New post 09 May 2018, 08:59
alanforde800Maximus wrote:
If snow accumulation increased at a constant rate of 30 millimeters per hour during a certain snowstorm, how many seconds did it take for snow accumulation to increase by 1 millimeter?

a) 1/120
b) 1/60
c) 1/20
d) 20
e) 120

I suspect the trap answer is A. It is easy to overlook units.

Shortcut: 1 hour = 3600 seconds
\(\frac{30mm}{1hour}=\frac{30mm}{3600secs}=\frac{1mm}{120secs}\)

Units are not the same. The answer is not A. In 120 seconds, 1mm of snow will accumulate.

Answer E

No shortcut: \((\frac{30mm}{1hour}*\frac{1hour}{60mins}*\frac{1min}{60secs})=\frac{30mm}{(60*60)secs}=\frac{30mm}{3600secs}\)

In the parentheses, hours and minutes cancel. Factor out 30, write the final units: \(\frac{1mm}{120secs}\)

Answer E
_________________
SC Butler has resumed!
Get two SC questions to practice, whose links you can find by date, here.


Tell me, what is it you plan to do with your one wild and precious life? -- Mary Oliver
Target Test Prep Representative
User avatar
D
Status: Founder & CEO
Affiliations: Target Test Prep
Joined: 14 Oct 2015
Posts: 6681
Location: United States (CA)
Re: If snow accumulation increased at a constant rate of 30 millimeters pe  [#permalink]

Show Tags

New post 10 May 2018, 10:40
alanforde800Maximus wrote:
If snow accumulation increased at a constant rate of 30 millimeters per hour during a certain snowstorm, how many seconds did it take for snow accumulation to increase by 1 millimeter?

a) 1/120
b) 1/60
c) 1/20
d) 20
e) 120


Recalling that 1 hour = 3600 seconds, we can create the equation:

30/3600 = 1/x

1/120 = 1/x

x = 120

Answer: E
_________________

Scott Woodbury-Stewart

Founder and CEO

Scott@TargetTestPrep.com
TTP - Target Test Prep Logo
122 Reviews

5-star rated online GMAT quant
self study course

See why Target Test Prep is the top rated GMAT quant course on GMAT Club. Read Our Reviews

If you find one of my posts helpful, please take a moment to click on the "Kudos" button.

Senior Manager
Senior Manager
User avatar
G
Joined: 29 Dec 2017
Posts: 384
Location: United States
Concentration: Marketing, Technology
GMAT 1: 630 Q44 V33
GMAT 2: 690 Q47 V37
GMAT 3: 710 Q50 V37
GPA: 3.25
WE: Marketing (Telecommunications)
If snow accumulation increased at a constant rate of 30 millimeters pe  [#permalink]

Show Tags

New post 11 Sep 2018, 09:59
I haven't seen on GMATCLUB the method that I use (that I was taught in my school to convert ratios). I hope it will be helpful, at least it makes my life easier. See attachment below
Attachments

1.png
1.png [ 4.69 KiB | Viewed 868 times ]

GMAT Club Bot
If snow accumulation increased at a constant rate of 30 millimeters pe   [#permalink] 11 Sep 2018, 09:59
Display posts from previous: Sort by

If snow accumulation increased at a constant rate of 30 millimeters pe

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne