Find all School-related info fast with the new School-Specific MBA Forum

It is currently 01 Sep 2014, 11:05

Happy Labor Day:

Free Access to New GMATClub Tests for all GMATClub Members!!


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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

How long, in minutes, did it take a bicycle wheel to roll

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Director
Director
avatar
Status: Preparing for the 4th time -:(
Joined: 25 Jun 2011
Posts: 563
Location: United Kingdom
Concentration: International Business, Strategy
GMAT Date: 06-22-2012
GPA: 2.9
WE: Information Technology (Consulting)
Followers: 13

Kudos [?]: 384 [0], given: 217

GMAT Tests User
How long, in minutes, did it take a bicycle wheel to roll [#permalink] New post 01 Apr 2012, 15:39
00:00
A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

74% (01:34) correct 26% (00:35) wrong based on 180 sessions
How long, in minutes, did it take a bicycle wheel to roll along a flat, straight 300-meter path?

(1) The wheel made one full 360-degree rotation every 1.5 meters.
(2) The wheel made 18 360-degree rotations per minute.

can someone please explain the concept?
[Reveal] Spoiler: OA

_________________

Best Regards,
E.

MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610 :-(

Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 25236
Followers: 3428

Kudos [?]: 25215 [0], given: 2702

Re: Rotations of a bicycle wheel [#permalink] New post 01 Apr 2012, 15:49
Expert's post
How long, in minutes, did it take a bicycle wheel to roll along a flat, straight 300-meter path?

Time=Distance:Rate, so to get the time we nee to find the rate of the bicycle.

(1) The wheel made one full 360-degree rotation every 1.5 meters --> basically tells us that the circumference of the wheel is 1.5 meters. Not sufficient.

(2) The wheel made 18 360-degree rotations per minute --> the rate of the bicycle is 18 circumference per minute, but since we don't know the length of the circumference then this statement is also insufficient.

(1)+(2) Th rate 18*circumference=18*1.5=27 meter/minute. Sufficient.

Answer: C.
_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Senior Manager
Senior Manager
User avatar
Joined: 01 Apr 2010
Posts: 300
Location: Kuwait
Schools: Sloan '16 (M)
GMAT 1: 710 Q49 V37
GPA: 3.2
WE: Information Technology (Consulting)
Followers: 4

Kudos [?]: 54 [0], given: 11

GMAT Tests User
Re: How long, in minutes, did it take a bicycle wheel to roll [#permalink] New post 20 Apr 2012, 18:54
Went with C. Above explanation is great,

basically we need a time reference and a distance reference to figure out how much time the wheel will take to go any distance, first one gives us the size of the wheel circumference in meters and the second tells us meters per minute using both pieces we can figure out how long it will take to roll any distance amount.
Expert Post
Math Expert
User avatar
Joined: 02 Sep 2009
Posts: 25236
Followers: 3428

Kudos [?]: 25215 [0], given: 2702

Re: How long, in minutes, did it take a bicycle wheel to roll [#permalink] New post 27 Jun 2013, 00:02
Expert's post
Bumping for review and further discussion*. Get a kudos point for an alternative solution!

*New project from GMAT Club!!! Check HERE

Theory on Distance/Rate Problems: distance-speed-time-word-problems-made-easy-87481.html

All DS Distance/Rate Problems to practice: search.php?search_id=tag&tag_id=44
All PS Distance/Rate Problems to practice: search.php?search_id=tag&tag_id=64

_________________

NEW TO MATH FORUM? PLEASE READ THIS: ALL YOU NEED FOR QUANT!!!

PLEASE READ AND FOLLOW: 11 Rules for Posting!!!

RESOURCES: [GMAT MATH BOOK]; 1. Triangles; 2. Polygons; 3. Coordinate Geometry; 4. Factorials; 5. Circles; 6. Number Theory; 7. Remainders; 8. Overlapping Sets; 9. PDF of Math Book; 10. Remainders; 11. GMAT Prep Software Analysis NEW!!!; 12. SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) NEW!!!; 12. Tricky questions from previous years. NEW!!!;

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?
25 extra-hard Quant Tests

Get the best GMAT Prep Resources with GMAT Club Premium Membership

Intern
Intern
avatar
Joined: 09 Jun 2012
Posts: 31
Followers: 0

Kudos [?]: 6 [0], given: 13

Re: Rotations of a bicycle wheel [#permalink] New post 22 Jul 2013, 01:51
Bunuel wrote:

(2) The wheel made 18 360-degree rotations per minute --> the rate of the bicycle is 18 circumference per minute, but since we don't know the length of the circumference then this statement is also insufficient.


I used 18 as the speed. Basically missed to calculate speed by multiplying number of rotations with circumference. Thanks for the explanation Bunuel!
Intern
Intern
avatar
Joined: 24 May 2013
Posts: 12
Followers: 0

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

GMAT ToolKit User
Re: How long, in minutes, did it take a bicycle wheel to roll [#permalink] New post 25 Jul 2013, 21:46
enigma123 wrote:
How long, in minutes, did it take a bicycle wheel to roll along a flat, straight 300-meter path?

(1) The wheel made one full 360-degree rotation every 1.5 meters.
(2) The wheel made 18 360-degree rotations per minute.

can someone please explain the concept?


An alternate solution may be

T= time taken to cover the entire distance
V= velocity
W= frequency = rev per sec
R= radius of wheel

Distance (300)= v * T = (wr)* T
Now w is given in second statement
And r is given in first statement

Hence c is the answer
Senior Manager
Senior Manager
User avatar
Joined: 13 May 2013
Posts: 476
Followers: 1

Kudos [?]: 49 [0], given: 134

Re: How long, in minutes, did it take a bicycle wheel to roll [#permalink] New post 28 Jul 2013, 15:38
How long, in minutes, did it take a bicycle wheel to roll along a flat, straight 300-meter path?

(1) The wheel made one full 360-degree rotation every 1.5 meters.
This tells us nothing about how long it took for the wheel to rotate.
NOT SUFFICIENT

(2) The wheel made 18 360-degree rotations per minute.
This tells us nothing about the size of the wheel.
INSUFFICIENT

1+2 we are told the diameter of the wheel and how long it takes to make a set number of rotations.
The wheel makes 18 full rotations per minute and travels 1.5 meters per rotation. Therefore it travels 24m/minute. 300/24 = 12.5

SUFFICIENT

(C)
Manager
Manager
avatar
Joined: 07 May 2013
Posts: 109
Followers: 0

Kudos [?]: 8 [0], given: 1

Re: How long, in minutes, did it take a bicycle wheel to roll [#permalink] New post 05 Aug 2013, 16:05
EASY way to understand this problem
replace the word 360 degrees with 1 revolution
1.5 mt=1 rev
300 mt=? which is 300/1.5

18 rev = 1 min
300/1.5 rev=? min
DO not do simplifications as it wastes valuable time.
problem solved>
Senior Manager
Senior Manager
avatar
Joined: 10 Jul 2013
Posts: 343
Followers: 3

Kudos [?]: 106 [0], given: 102

Re: How long, in minutes, did it take a bicycle wheel to roll [#permalink] New post 05 Aug 2013, 22:38
enigma123 wrote:
How long, in minutes, did it take a bicycle wheel to roll along a flat, straight 300-meter path?

(1) The wheel made one full 360-degree rotation every 1.5 meters.
(2) The wheel made 18 360-degree rotations per minute.

can someone please explain the concept?


st(1), nothing about time, so not sufficient.
st(2), 18 × 360-degree rotations in = 1 minute.
but need this data in aspect of meter.
so using both statement together,
18 × 360-degree rotations = 18 × 1.5 = 27meters.

27 meters in = 1 minute
so, 300 meters in = 300/27 = fixed value.
so both together are sufficient. Answer C
_________________

Asif vai.....

Re: How long, in minutes, did it take a bicycle wheel to roll   [#permalink] 05 Aug 2013, 22:38
    Similar topics Author Replies Last post
Similar
Topics:
A bicycle wheel has a diameter 0.71m. How many complete chiccufrazer1 1 06 Jan 2013, 04:37
How long did it take? Youth84 4 09 Dec 2008, 11:10
If it takes 5 machines 5 minutes to make 5 widgets, how long chalven1 3 03 Sep 2008, 12:55
If a bicycle wheel has a radius of 14 inches. HOw many puma 5 06 Apr 2008, 09:45
How long did it take Betty to drive nonstop on a trip from gablaze23 4 01 Aug 2007, 07:20
Display posts from previous: Sort by

How long, in minutes, did it take a bicycle wheel to roll

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

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

Powered by phpBB © phpBB Group and phpBB SEO

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®.