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

It is currently 19 Oct 2019, 13:51

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

What was Marla's travel time from Minneapolis to Baltimore?

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

Hide Tags

Find Similar Topics 
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 58445
What was Marla's travel time from Minneapolis to Baltimore?  [#permalink]

Show Tags

New post 22 Jan 2018, 01:23
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

65% (02:08) correct 35% (01:45) wrong based on 105 sessions

HideShow timer Statistics

What was Marla's travel time from Minneapolis to Baltimore?

(1) If Marla's average speed during the nonstop trip had been 12 miles per hour faster her time would have been 3 hours fewer than it was.
(2) If Marla's average speed had been 1.5 times as fast the trip would have taken 12 hours.

_________________
Retired Moderator
avatar
D
Joined: 25 Feb 2013
Posts: 1178
Location: India
GPA: 3.82
GMAT ToolKit User Reviews Badge
What was Marla's travel time from Minneapolis to Baltimore?  [#permalink]

Show Tags

New post 22 Jan 2018, 10:07
Bunuel wrote:
What was Marla's travel time from Minneapolis to Baltimore?

(1) If Marla's average speed during the nonstop trip had been 12 miles per hour faster her time would have been 3 hours fewer than it was.
(2) If Marla's average speed had been 1.5 times as fast the trip would have taken 12 hours.


let the distance between the two places be \(d\) and average speed be v. we need the value \(\frac{d}{v}\)

Statement 1: if the average speed is \(v\), then we have \(\frac{d}{v}-\frac{d}{(v+12)}=3\)

we need to find \(\frac{d}{v}\), but there are two variable and one equation. Hence value cannot be found. Insufficient

Statement 2: if the original average speed is \(v\) then the new speed\(=1.5v\)

hence time taken \(\frac{d}{1.5v}=12 =>\frac{d}{v}=12*1.5\). Sufficient

Option B
Marshall & McDonough Moderator
User avatar
D
Joined: 13 Apr 2015
Posts: 1684
Location: India
GMAT ToolKit User
Re: What was Marla's travel time from Minneapolis to Baltimore?  [#permalink]

Show Tags

New post 22 Jan 2018, 10:14
St1: d = st --- (1)
d = (s + 12)(t - 3) --- (2)
st = (s + 12)(t - 3)
Not sufficient to calculate t as we have 2 unknowns.

St2: d = st
d = (3/2)s * 12
t = 18 hours
Sufficient

Answer: B
GMAT Club Bot
Re: What was Marla's travel time from Minneapolis to Baltimore?   [#permalink] 22 Jan 2018, 10:14
Display posts from previous: Sort by

What was Marla's travel time from Minneapolis to Baltimore?

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





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne