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

It is currently 21 Apr 2019, 17:20

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

Sam drove at a constant speed from inn A along a highway to inn B.

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

Hide Tags

 
General GMAT Forum Moderator
avatar
V
Joined: 29 Jan 2015
Posts: 1212
Location: India
WE: General Management (Non-Profit and Government)
GMAT ToolKit User Premium Member Reviews Badge CAT Tests
Sam drove at a constant speed from inn A along a highway to inn B.  [#permalink]

Show Tags

New post 08 Apr 2019, 11:27
1
00:00
A
B
C
D
E

Difficulty:

  65% (hard)

Question Stats:

55% (02:41) correct 45% (01:53) wrong based on 31 sessions

HideShow timer Statistics

Sam drove at a constant speed from City X along a highway to City Y. Did Sam reach City Y from City X in less than an hour?

(1) If Sam had driven at the same speed to City Z that was 15 kilometers further down the highway, he would have taken 50% more time

(2) If Sam's average speed for the drive had been 20 kilometers per hour lesser, he would have taken 50% more time

_________________
If you liked my post, kindly give me a Kudos. Thanks.
Manager
Manager
avatar
S
Joined: 19 Apr 2017
Posts: 73
Concentration: General Management, Sustainability
Schools: ESSEC '22
GPA: 3.9
WE: Operations (Hospitality and Tourism)
Sam drove at a constant speed from inn A along a highway to inn B.  [#permalink]

Show Tags

New post 18 Apr 2019, 07:57
2
1
Sam drove at a constant speed from City X along a highway to City Y. Did Sam reach City Y from City X in less than an hour?

Question: is T<1 hours??
Solution: The question uses the same unit for distance, time and speed so no conversion is required.

1) If Sam had driven at the same speed to City Z that was 15 kilometers further down the highway, he would have taken 50% more time

X----T-----Y---(50%T)---Z

\(Speed1 = \frac{distance}{time} = \frac{d}{t}\)

\(Speed2 = \frac{d+15}{1.5t}\)

\(Speed1= speed 2 = \frac{d}{t} = \frac{d+15}{1.5t} => d+15 = 1.5d => 15=0.5d => d=30 Km\)

Speed and time are unknown, Not sufficient

(2) If Sam's average speed for the drive had been 20 kilometers per hour lesser, he would have taken 50% more time

\(Distance1 = Speed*Time = (S)T\)
\(Distance2 = Speed*Time = (S-20)(1.5)T\)
\(Distance1 = Distance2 = ST = (S-20)(1.5)T => S=(S-20)(1.5) => S=60 Km/hr\)

Only speed is available, distance and time are not... if the distance is more than 60 then time is greater than 1 hour, less than 60 time is less than 1 hour. Not sufficient

Using 1 and 2
From 1: distance=30 Km
From 2: Speed = 60 Km/Hour

\(Time = \frac{Distance}{Speed} = \frac{30}{60}=\frac{1}{2}hour\) = 30 mins < 1 hour sufficient. C
GMAT Club Bot
Sam drove at a constant speed from inn A along a highway to inn B.   [#permalink] 18 Apr 2019, 07:57
Display posts from previous: Sort by

Sam drove at a constant speed from inn A along a highway to inn B.

  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®.