Author 
Message 
TAGS:

Hide Tags

Senior Manager
Status: DDay is on February 10th. and I am not stressed
Affiliations: American Management association, American Association of financial accountants
Joined: 12 Apr 2011
Posts: 264
Location: Kuwait
Schools: Columbia university

If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
03 Feb 2012, 08:24
3
This post received KUDOS
17
This post was BOOKMARKED
Question Stats:
77% (02:04) correct
23% (01:18) wrong based on 619 sessions
HideShow timer Statistics
If the speed of X meters per second is equivalent to the speed of Y kilometers per hour, what is Y in terms of X? (1 kilometer=1000 meters) A. 15x/18 B. 6x/5 C. 18x/5 D. 60x E. 3600000x can someone explain please, and what is the quickest way to aproach this type of question
Official Answer and Stats are available only to registered users. Register/ Login.
_________________
Sky is the limit



Math Expert
Joined: 02 Sep 2009
Posts: 39678

Re: x meters vs y kilometers [#permalink]
Show Tags
03 Feb 2012, 08:32
9
This post received KUDOS
Expert's post
3
This post was BOOKMARKED
If the speed of X meters per second is equivalent to the speed of Y kilometers per hour, what is Y in terms of X? (1 kilometer=1000 meters)A. 15x/18 B. 6x/5 C. 18x/5 D. 60x E. 3600000x X meters per second > > 3,600X meters per hour (as there are 3,600 seconds in one hour); > 3,600X/1,000=18X/5 kilometers per hour (as there are 1,000 meters in one kilometer). Answer: C. OR: if you are not comfortable with above manipulations with variable X then you can assume x to be equal to some #: let x=10. Speed = 10 meters per second > > 10*3,600=36,000 meters per hour > > 36,000/1000=36 kilometers per hour. So, if x=10, then y=36. Plug x=10 into the answer choices, the one which give 36 will be the correct answer: A. 15x/18=150/18<36; B. 6x/5=60/5=12; C. 18x/5=36 correct choice; D. 60x=600; E. 3,600,000x=36,000,000. Answer: C.
_________________
New to the Math Forum? Please read this: All You Need for Quant  PLEASE READ AND FOLLOW: 12 Rules for Posting!!! Resources: GMAT Math Book  Triangles  Polygons  Coordinate Geometry  Factorials  Circles  Number Theory  Remainders; 8. Overlapping Sets  PDF of Math Book; 10. Remainders  GMAT Prep Software Analysis  SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS)  Tricky questions from previous years.
Collection of Questions: PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.
What are GMAT Club Tests? Extrahard Quant Tests with Brilliant Analytics



Manager
Joined: 24 Jan 2013
Posts: 79

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
19 Mar 2013, 16:23
6
This post received KUDOS
1
This post was BOOKMARKED
If the speed of x meters per second is equivalent to the speed of y kilometers per hour, what is y in terms of x? (1 kilometer=1000meters).
\(y*\frac{kilometers}{hour}=x*\frac{meters}{seconds}\)
\(y*\frac{1\;kilometer}{1\; hour}*\frac{1000 \;meters}{1 \;kilometer}*\frac{1\; hour}{3600 \;seconds}=x*\frac{meters}{seconds}\)
\(y*\frac{1000 \;meters}{3600 \;seconds}=x*\frac{meters}{seconds}\) > \(y=\frac{3600}{1000}*x=\frac{18}{5}*x\)
Answer C



Math Expert
Joined: 02 Sep 2009
Posts: 39678

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
30 Oct 2012, 10:07
3
This post received KUDOS
Expert's post
8
This post was BOOKMARKED



SVP
Status: The Best Or Nothing
Joined: 27 Dec 2012
Posts: 1857
Location: India
Concentration: General Management, Technology
WE: Information Technology (Computer Software)

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
02 Sep 2014, 22:40
1
This post received KUDOS
x meters in 1 second i.e \(\frac{x}{1000}\) Kms in 1 Second i.e \(\frac{x}{1000}\) Kms in \(\frac{1}{60}\) Minutes i.e \(\frac{x}{1000}\) Kms in \(\frac{1}{3600}\) Hour i.e \(\frac{x}{1000} * 3600\) in 1 Hr = Y \(y = \frac{18x}{5}\) Answer = C
_________________
Kindly press "+1 Kudos" to appreciate



Senior Manager
Status: DDay is on February 10th. and I am not stressed
Affiliations: American Management association, American Association of financial accountants
Joined: 12 Apr 2011
Posts: 264
Location: Kuwait
Schools: Columbia university

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
03 Feb 2012, 10:13
thanks alot. I am more comfortable working with the second approach, I needed someone to do it with plugging in approach. Thanks alot
_________________
Sky is the limit



Manager
Joined: 11 Aug 2012
Posts: 127

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
30 Oct 2012, 08:48
Bunuel, is this a word problem or what tipe of problem is? Do you have a link to find more of these problems, please?



Senior Manager
Status: Prevent and prepare. Not repent and repair!!
Joined: 13 Feb 2010
Posts: 259
Location: India
Concentration: Technology, General Management
GPA: 3.75
WE: Sales (Telecommunications)

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
16 Nov 2012, 03:36
This is a sub600 question.
_________________
I've failed over and over and over again in my life and that is why I succeedMichael Jordan Kudos drives a person to better himself every single time. So Pls give it generously Wont give up till i hit a 700+



Senior Manager
Joined: 13 May 2013
Posts: 469

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
02 Aug 2013, 11:05
If the speed of X meters per second is equivalent to the speed of Y kilometers per hour, what is Y in terms of X? (1 kilometer=1000 meters)
We need to find an equation with x in the answer... convert all measurements so they are alike (i.e. convert km to m, seconds to hours, etc)
Speed = x/t x meters/second (3600) x meters/hour
Speed = y/t y KM/hour Speed = y(1000m)/hour
y(1000meters)/hour = (3600) x meters/hour
y(1000)/1hour = x(3600) / 1 hour y(1000) = x(3600) y = 3.6x
Answer: C. 18x/5



GMAT Club Legend
Joined: 09 Sep 2013
Posts: 15977

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
02 Sep 2014, 21:27
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



GMAT Club Legend
Joined: 09 Sep 2013
Posts: 15977

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
09 Sep 2015, 03:12
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



GMAT Club Legend
Joined: 09 Sep 2013
Posts: 15977

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
03 Oct 2016, 22:36
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



Intern
Joined: 16 Dec 2016
Posts: 4

If the speed of x meters per second is equivalent to y kilometers per [#permalink]
Show Tags
16 Dec 2016, 03:58
If the speed of x meters per second is equivalent to y kilometers per hour, what is y in terms of x? (1km = 1,000 meters)
a) [5x][/18]
b) [6x][/5]
c) [18x][/5]
d) 60x
e) 3,600,000x



Math Expert
Joined: 02 Sep 2009
Posts: 39678

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
16 Dec 2016, 04:09



Intern
Joined: 02 Jan 2017
Posts: 7

Re: If the speed of X meters per second is equivalent to the [#permalink]
Show Tags
25 Jun 2017, 14:00
Bunuel wrote: If the speed of X meters per second is equivalent to the speed of Y kilometers per hour, what is Y in terms of X? (1 kilometer=1000 meters)
A. 15x/18 B. 6x/5 C. 18x/5 D. 60x E. 3600000x
X meters per second > > 3,600X meters per hour (as there are 3,600 seconds in one hour); > 3,600X/1,000=18X/5 kilometers per hour (as there are 1,000 meters in one kilometer).
Answer: C.
OR: if you are not comfortable with above manipulations with variable X then you can assume x to be equal to some #: let x=10.
Speed = 10 meters per second > > 10*3,600=36,000 meters per hour > > 36,000/1000=36 kilometers per hour.
So, if x=10, then y=36. Plug x=10 into the answer choices, the one which give 36 will be the correct answer: A. 15x/18=150/18<36; B. 6x/5=60/5=12; C. 18x/5=36 correct choice; D. 60x=600; E. 3,600,000x=36,000,000.
Answer: C. Hi Bunuel, I'm a lil bit confused here. If x m/s ≈ y km/hr I tot it shd be A because 1 km/hr ≈ 1000/3600 m/s so y ≈ 5/18 Why did you choose the inverse Sent from my D6503 using GMAT Club Forum mobile app




Re: If the speed of X meters per second is equivalent to the
[#permalink]
25 Jun 2017, 14:00







