It is currently 17 Oct 2017, 10:14

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# How long did it take Betty to drive nonstop on a trip from

Author Message
Joined: 26 Mar 2007
Posts: 485

Kudos [?]: 67 [0], given: 123

GMAT 1: 680 Q44 V38
How long did it take Betty to drive nonstop on a trip from [#permalink]

### Show Tags

01 Aug 2007, 08:20
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

### HideShow timer Statistics

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

How long did it take Betty to drive nonstop on a trip from her home to Denver, Colorado.

1 If Betty's average speed for the trip had been 1 1/2 times as fast, the trip would have taken two hours.

This is supposed to be enough.

The explanation states that Betty's driving rate is 3/2R.

I don't understand how this would translate to 2/3t for distance.

How do you get 2/3 for distance?

Thanks.

Kudos [?]: 67 [0], given: 123

Senior Manager
Joined: 04 Jun 2007
Posts: 345

Kudos [?]: 33 [0], given: 0

Re: DS: Help me understand the explanation. [#permalink]

### Show Tags

01 Aug 2007, 09:01
gablaze23 wrote:
How long did it take Betty to drive nonstop on a trip from her home to Denver, Colorado.

1 If Betty's average speed for the trip had been 1 1/2 times as fast, the trip would have taken two hours.

This is supposed to be enough.

The explanation states that Betty's driving rate is 3/2R.

I don't understand how this would translate to 2/3t for distance.

How do you get 2/3 for distance?

Thanks.

Avg. speed R.
Distance d.
Time t.

So, d = Rt

Now, Avg. speed = 3/2R
Time = 2
So, d = (3/2)R*2 = 3R

Since distance is same, 3R=Rt
t=3. So, sufficient.

Kudos [?]: 33 [0], given: 0

Director
Joined: 09 Aug 2006
Posts: 521

Kudos [?]: 110 [0], given: 0

Re: DS: Help me understand the explanation. [#permalink]

### Show Tags

04 Aug 2007, 09:58
gablaze23 wrote:
How long did it take Betty to drive nonstop on a trip from her home to Denver, Colorado.

1 If Betty's average speed for the trip had been 1 1/2 times as fast, the trip would have taken two hours.

This is supposed to be enough.

The explanation states that Betty's driving rate is 3/2R.

I don't understand how this would translate to 2/3t for distance.

How do you get 2/3 for distance?

Thanks.

Could you please post the complete question.. Thnx.

Kudos [?]: 110 [0], given: 0

Director
Joined: 11 Jun 2007
Posts: 910

Kudos [?]: 278 [0], given: 0

### Show Tags

05 Aug 2007, 02:24
what is the source of this question? it looks vaguely familiar to me.

Kudos [?]: 278 [0], given: 0

GMAT Instructor
Joined: 04 Jul 2006
Posts: 1259

Kudos [?]: 335 [0], given: 0

Re: DS: Help me understand the explanation. [#permalink]

### Show Tags

05 Aug 2007, 03:37
gablaze23 wrote:
How long did it take Betty to drive nonstop on a trip from her home to Denver, Colorado.

1 If Betty's average speed for the trip had been 1 1/2 times as fast, the trip would have taken two hours.

This is supposed to be enough.

The explanation states that Betty's driving rate is 3/2R.

I don't understand how this would translate to 2/3t for distance.

How do you get 2/3 for distance?

Thanks.

Suppose the distance is d and the average speed is v. We need to find d/v and we are given that d/(3v/2)=2. We can find d/v by multiplying both sides of the equation by 2/3

Kudos [?]: 335 [0], given: 0

Re: DS: Help me understand the explanation.   [#permalink] 05 Aug 2007, 03:37
Display posts from previous: Sort by