GMAT Question of the Day: Daily via email | Daily via Instagram New to GMAT Club? Watch this Video

 It is currently 29 May 2020, 21:58

### 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

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

# How many hours did it take Dale to drive from A-town to B-town?

Author Message
TAGS:

### Hide Tags

Manager
Status: Do and Die!!
Joined: 15 Sep 2010
Posts: 237
How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

20 Dec 2011, 06:47
3
17
00:00

Difficulty:

25% (medium)

Question Stats:

70% (01:01) correct 30% (01:23) wrong based on 572 sessions

### HideShow timer Statistics

How many hours did it take Dale to drive from A-town to B-town?

(1) If Dale’s average speed for the trip had been three times as fast, the trip would have taken 2 hours.

(2) The distance from A-town to B-town is 100 miles.

_________________
I'm the Dumbest of All !!
Magoosh GMAT Instructor
Joined: 28 Nov 2011
Posts: 300
Re: How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

20 Dec 2011, 10:41
15
2
The mathematical expression only seems to complicate things and requires quite a few steps. Thinking about the problem logically, on the other hand, can allow you to deal with (1) in a matter of seconds.

If Dale triples his average speed, then he spends 1/3 less time on the trip. Because he spends 2 hours completing the trip at triple the speed, the original trip would have taken him 6 hours. SUFFICIENT

For (2) we are only given the distance between two cities, A and B. Nowhere is there any rate, so we cannot answer the question. INSUFFICIENT

A.
_________________
Christopher Lele
Magoosh Test Prep

##### General Discussion
Intern
Joined: 14 Sep 2010
Posts: 10
Re: How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

20 Dec 2011, 20:16
3
1
Statement 1 is sufficient

T = D/S

2 = D/3S

6 = D/S

T = D/S = 6

Statement 2 gives

T = 100/S

so the value of T depends on the unknown value of S. Insufficient.
Manager
Joined: 29 Jul 2011
Posts: 69
Location: United States
Re: How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

06 Jan 2012, 17:34
2
Let d = distance, x = rate. Time = d/x.

1. If 3x rate -> d/3x = 2 hours -> d/x = 6 hours. Suff
2. d = 100. -> d/x = 100/x, but no info on x. Insuff.

A.
Manager
Joined: 20 Aug 2011
Posts: 91
Re: How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

20 Dec 2011, 07:02
1
Time= distance/speed

let-
distance be d

A.
avg. speed (s1)=d/t1
time taken=t1
t1=d/s1

avg. speed=3s1
time taken=t2
t2=d/3s1

According to given condition
t2-t1=2
d/s1(1-1/3)=2
d/s1=something
Sufficient

Eliminate B, C, & E.

2.
Insufficient

Hence A
Manager
Joined: 12 Oct 2011
Posts: 137
Re: How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

05 Jan 2012, 06:49
Easy one this.
Statement 1 mentions that if he travels at thrice his average speed, he will take 2 hours. Thus he would have taken 6 hours at his average speed. SUFFICIENT.
Statement 2 gives us no information about rate of travel. INSUFFICIENT.
Manager
Joined: 23 Feb 2012
Posts: 197
Location: India
Concentration: Finance, Entrepreneurship
Schools: Said
GMAT 1: 710 Q44 V44
GPA: 2.9
WE: Marketing (Computer Software)
Re: How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

10 Mar 2012, 00:16
It's tempting to start putting D-S-T on paper and trying to attempt this. But ChrisLele's solution validated my approach of simply talking my way to the solution!
Non-Human User
Joined: 09 Sep 2013
Posts: 15019
Re: How many hours did it take Dale to drive from A-town to B-town?  [#permalink]

### Show Tags

26 Mar 2020, 19:30
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.
_________________
Re: How many hours did it take Dale to drive from A-town to B-town?   [#permalink] 26 Mar 2020, 19:30