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

It is currently 15 Aug 2018, 17:27

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

A comet travels 12,000/y meters in 600/x seconds. What is the speed of

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

Hide Tags

Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 47920
A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 22 Sep 2016, 05:15
2
5
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

75% (01:18) correct 25% (01:12) wrong based on 130 sessions

HideShow timer Statistics

Retired Moderator
avatar
G
Joined: 26 Nov 2012
Posts: 598
Premium Member
Re: A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 22 Sep 2016, 07:04
3
Bunuel wrote:
A comet travels 12,000/y meters in 600/x seconds. What is the speed of the comet in kilometers per hour?

A. 20y/x
B. 20x/y
C. 72y/x
D. 72x/y
E. 20xy


Given 12,000/y meters and Speed in 600/x seconds.

Now 1000 meters = 1km and 60 seconds = 1 min

Now 12,000/y => 12/y(1000) now to convert this into km we need to divide it by 1000...we get 12/y

Similarly 600/x => 600/x * 60 => 10/x min and now we need to convert this into hour 10/x * 60 => 1/6x ( since asked us to find in hours)

Now D = S*T

S = 12/y * 6x = 72x/y.

IMO option D.
Manager
Manager
User avatar
B
Joined: 24 Aug 2016
Posts: 68
Location: India
WE: Information Technology (Computer Software)
Re: A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 22 Sep 2016, 07:56
1
\(\frac{12,000}{y}meters\)= \(\frac{12000}{(1000 * y)}\) km =\(\frac{12}{y}\)Km

\(\frac{600}{x}\)seconds =\(\frac{600}{(60*60*x)}\)Hours = \(\frac{1}{6x}\)Hours

\(Speed = \frac{Distance}{Time} = ( \frac{12}{y}) / ( \frac{1}{6x} )\) =\(\frac{(12*6*x)}{y} =\frac{72x}{y}\)

Ans D.
_________________

"If we hit that bullseye, the rest of the dominos will fall like a house of cards. Checkmate."

Director
Director
User avatar
B
Status: I don't stop when I'm Tired,I stop when I'm done
Joined: 11 May 2014
Posts: 551
Location: Bangladesh
Concentration: Finance, Leadership
GPA: 2.81
WE: Business Development (Real Estate)
A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 23 Sep 2016, 05:45
1
Top Contributor
Bunuel wrote:
A comet travels 12,000/y meters in 600/x seconds. What is the speed of the comet in kilometers per hour?

A. 20y/x
B. 20x/y
C. 72y/x
D. 72x/y
E. 20xy


Speed of the comet=\(\frac{12000*x}{y*600}\) meters per second=\(\frac{12000*x*3600}{y*600*1000}\) kilometers per hour=\(\frac{72x}{y}\)kilometers per hour

Correct Answer D
_________________

Md. Abdur Rakib

Please Press +1 Kudos,If it helps
Sentence Correction-Collection of Ron Purewal's "elliptical construction/analogies" for SC Challenges

Manager
Manager
avatar
S
Joined: 24 Oct 2013
Posts: 145
Location: India
Concentration: General Management, Strategy
WE: Information Technology (Computer Software)
Re: A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 23 Sep 2016, 08:43
2
12,000/y meters = 12000/1000 y miles

600/x seconds = 600/(60*60)x hours

(12/y)/(1/6)x = 12*6x/y = 72 x/y

D
Current Student
avatar
B
Joined: 26 Jan 2016
Posts: 110
Location: United States
GPA: 3.37
Re: A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 23 Sep 2016, 12:51
1
does plugging in numbers work for this?
Intern
Intern
avatar
Joined: 18 Sep 2016
Posts: 49
A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 23 Sep 2016, 13:27
1
Bunuel wrote:
A comet travels 12,000/y meters in 600/x seconds. What is the speed of the comet in kilometers per hour?

A. 20y/x
B. 20x/y
C. 72y/x
D. 72x/y
E. 20xy



\(\frac{12000}{y}*\frac{m}{600*s}*x\)

divided by 1000 to express in Km and than multiplied by 3600 to express in h ====> \(72*\frac{x}{y}\) \(\frac{Km}{h}\)

answer D
_________________

Please press Kudos if you like my post

Manager
Manager
avatar
S
Joined: 24 Oct 2013
Posts: 145
Location: India
Concentration: General Management, Strategy
WE: Information Technology (Computer Software)
Re: A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 23 Sep 2016, 19:53
2
joannaecohen wrote:
does plugging in numbers work for this?


In this case , converting meters and seconds to miles and hours plays main role. Plugging wont really help in here
Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 7712
Premium Member
Re: A comet travels 12,000/y meters in 600/x seconds. What is the speed of  [#permalink]

Show Tags

New post 19 Dec 2017, 14:37
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Re: A comet travels 12,000/y meters in 600/x seconds. What is the speed of &nbs [#permalink] 19 Dec 2017, 14:37
Display posts from previous: Sort by

A comet travels 12,000/y meters in 600/x seconds. What is the speed of

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

Events & Promotions

PREV
NEXT


GMAT Club MBA Forum Home| About| Terms and Conditions and Privacy Policy| 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®.