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

It is currently 16 Jan 2019, 00:15

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 in January
PrevNext
SuMoTuWeThFrSa
303112345
6789101112
13141516171819
20212223242526
272829303112
Open Detailed Calendar
  • The winning strategy for a high GRE score

     January 17, 2019

     January 17, 2019

     08:00 AM PST

     09:00 AM PST

    Learn the winning strategy for a high GRE score — what do people who reach a high score do differently? We're going to share insights, tips and strategies from data we've collected from over 50,000 students who used examPAL.
  • Free GMAT Strategy Webinar

     January 19, 2019

     January 19, 2019

     07:00 AM PST

     09:00 AM PST

    Aiming to score 760+? Attend this FREE session to learn how to Define your GMAT Strategy, Create your Study Plan and Master the Core Skills to excel on the GMAT.

Was Rylon’s average speed greater than 55 miles per hour? (1) Rylon dr

  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: 52119
Was Rylon’s average speed greater than 55 miles per hour? (1) Rylon dr  [#permalink]

Show Tags

New post 17 Apr 2018, 04:30
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

89% (01:12) correct 11% (01:36) wrong based on 48 sessions

HideShow timer Statistics

Was Rylon’s average speed greater than 55 miles per hour?

(1) Rylon drove 100 miles in 1 hour 48 minutes.
(2) Rylon drove 60 miles at an average speed of 60 miles per hour, and then drove 40 miles at an average speed of 50 miles per hour.

_________________

New to the Math Forum?
Please read this: Ultimate GMAT Quantitative Megathread | 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?
Extra-hard Quant Tests with Brilliant Analytics

VP
VP
User avatar
V
Status: It's near - I can see.
Joined: 13 Apr 2013
Posts: 1363
Location: India
Concentration: International Business, Operations
GMAT 1: 480 Q38 V22
GPA: 3.01
WE: Engineering (Consulting)
Premium Member Reviews Badge
Re: Was Rylon’s average speed greater than 55 miles per hour? (1) Rylon dr  [#permalink]

Show Tags

New post 17 Apr 2018, 23:25
Bunuel wrote:
Was Rylon’s average speed greater than 55 miles per hour?

(1) Rylon drove 100 miles in 1 hour 48 minutes.
(2) Rylon drove 60 miles at an average speed of 60 miles per hour, and then drove 40 miles at an average speed of 50 miles per hour.


Average Speed = Total distance/Total time

St 1: A.S. = 100 /1.8

A.S. = 55.555 m/h Sufficient

St 2: Time 1 = 60/60 = 1hr

Time 2 = 40/50 = 0.8 hr

A.S. = (60 + 40)/1.8

A.S = 55.555 m/h Sufficient

(D)
_________________

"Do not watch clock; Do what it does. KEEP GOING."

Intern
Intern
avatar
B
Joined: 21 Aug 2017
Posts: 17
Location: India
Concentration: Entrepreneurship, Technology
WE: Operations (Other)
Re: Was Rylon’s average speed greater than 55 miles per hour? (1) Rylon dr  [#permalink]

Show Tags

New post 18 Apr 2018, 07:34
The answer is (D). We need to know whether the average speed is over 50 mph. Therefore, we will work with the average speed formula, of which we have 2. When we just have the distance and time, we work with the \(\frac{total distance}{total time}\) formula. But when we have distance and speed, we can calculate the time and then work out the average speed.

Lets get to the good stuff now.

Statement (1) states that Rylon drove 100 miles in 1 hr 48 mins. Speed = \(\frac{distance}{time}\)
=> Speed = \(100/1\frac{48}{60}\)
=> 100/1.8=55.5555. Therefore, statement (1) is sufficient.

Statement (2) states that Rylon drove 60 miles at 60mph and 40 miles at 50mph. We can use a weighted average here or we can do a manual calculation of distance travelled in time. I prefer the following calculation.
=> travelling 60 miles at 60 mph will take 1 hour. Travelling 40 miles at 50 mph will take 4/5th of an hour (40/50) so 60 * \frac{4}{5} is 48 minutes.
Thus, 1 hour + 48 minutes to travel a distance of 60 miles + 40 miles. Thats 1 hr 48 mins to travel 100 miles. Plug this into our first formula and we get the average speed.
Therefore, statement (2) is sufficient as well.

Thus, the correct answer is option (D).
GMAT Club Bot
Re: Was Rylon’s average speed greater than 55 miles per hour? (1) Rylon dr &nbs [#permalink] 18 Apr 2018, 07:34
Display posts from previous: Sort by

Was Rylon’s average speed greater than 55 miles per hour? (1) Rylon dr

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


Copyright

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®.