It is currently 15 Jan 2018, 23:59

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

When the wind speed is 9 miles per hour, the wind-chill factor w is

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

Hide Tags

Manager
Manager
avatar
B
Status: Persevere
Joined: 08 Jan 2016
Posts: 123

Kudos [?]: 274 [0], given: 94

Location: Hong Kong
GMAT 1: 750 Q50 V41
GPA: 3.52
Reviews Badge
When the wind speed is 9 miles per hour, the wind-chill factor w is [#permalink]

Show Tags

New post 23 May 2016, 02:35
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

72% (01:31) correct 28% (01:03) wrong based on 180 sessions

HideShow timer Statistics

When the wind speed is 9 miles per hour, the wind-chill factor w is given by w = -17.366 + 1.19t, where t is the temperature in degrees Fahrenheit. If at noon yesterday the wind speed was 9 miles per hour, was the wind-chill factor greater than 0 ?

(1) The temperature at noon yesterday was greater than 10 degrees Fahrenheit.

(2) The temperature at noon yesterday was less than 20 degrees Fahrenheit
[Reveal] Spoiler: OA

Kudos [?]: 274 [0], given: 94

Expert Post
1 KUDOS received
Math Expert
User avatar
D
Joined: 02 Aug 2009
Posts: 5511

Kudos [?]: 6398 [1], given: 122

Re: When the wind speed is 9 miles per hour, the wind-chill factor w is [#permalink]

Show Tags

New post 23 May 2016, 04:27
1
This post received
KUDOS
Expert's post
1
This post was
BOOKMARKED
nalinnair wrote:
When the wind speed is 9 miles per hour, the wind-chill factor w is given by w = -17.366 + 1.19t, where t is the temperature in degrees Fahrenheit. If at noon yesterday the wind speed was 9 miles per hour, was the wind-chill factor greater than 0 ?

(1) The temperature at noon yesterday was greater than 10 degrees Fahrenheit.

(2) The temperature at noon yesterday was less than 20 degrees Fahrenheit


In such Qs, it is possible on many occasions, May not be here, that one of the statements gives you a value which will give you a range that will suffice.. May not be here

w = -17.366 + 1.19t....
(1) The temperature at noon yesterday was greater than 10 degrees Fahrenheit.
w = -17.366 + 1.19t so here w > -17.366 + 1.19*10 = -17.366+11.9= -6.abc.. so A value belw 0 is also possible and also above0.... ....
Insuff..

(2) The temperature at noon yesterday was less than 20 degrees Fahrenheit
w = -17.366 + 1.19t so here w < -17.366 + 1.19*20 = -17.366+23.8= 6.xyz.. so A value below 0 is also possible and also above 0.... ....
Insuff..

Combined
again the range is -6 to 6..
Insuff
E
_________________

Absolute modulus :http://gmatclub.com/forum/absolute-modulus-a-better-understanding-210849.html#p1622372
Combination of similar and dissimilar things : http://gmatclub.com/forum/topic215915.html


BANGALORE/-

Kudos [?]: 6398 [1], given: 122

Intern
Intern
avatar
B
Joined: 27 Apr 2015
Posts: 26

Kudos [?]: 3 [0], given: 131

GMAT 1: 370 Q29 V13
Reviews Badge
Re: When the wind speed is 9 miles per hour, the wind-chill factor w is [#permalink]

Show Tags

New post 20 Dec 2017, 07:52
nalinnair wrote:
When the wind speed is 9 miles per hour, the wind-chill factor w is given by w = -17.366 + 1.19t, where t is the temperature in degrees Fahrenheit. If at noon yesterday the wind speed was 9 miles per hour, was the wind-chill factor greater than 0 ?

(1) The temperature at noon yesterday was greater than 10 degrees Fahrenheit.

(2) The temperature at noon yesterday was less than 20 degrees Fahrenheit


Given
=> w=-17.366+1.19t Is w>0

Now for 'w>0'
=> (-17.366+1.19t) should be >0
=> (-17.366+1.19t)>0
=> 1.19t>17.366
=> t>17.366/1.19 or
=> t>173.66/11.9 or
=> t>173.66/12
=> t>14

So if t>14 then w>0

Statement 1 t>10 therefore 2 scenario
a)if 10<t<14 then w<0
b)if t>14 then w>0
Since NO unique sol. Therefore NOT sufficient

Statement 2 t<20 therefore 2 scenario
a) if 14<t<20 then w>0
b) if t<14 then w<0
Since NO unique sol. Therefore NOT sufficient

BOTH 1 & 2
from Stat 1 t>10
from stat 2 t<20
Therefore 10<t<20
AGAIN 2 scenario.Therefore NOT sufficient

Therefore "E"

Thanks

Kudos [?]: 3 [0], given: 131

Re: When the wind speed is 9 miles per hour, the wind-chill factor w is   [#permalink] 20 Dec 2017, 07:52
Display posts from previous: Sort by

When the wind speed is 9 miles per hour, the wind-chill factor w is

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


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.