Find all School-related info fast with the new School-Specific MBA Forum

It is currently 01 Sep 2014, 20:49

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.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

What is the average speed of the car in a travel of 180Km

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Manager
Manager
avatar
Joined: 07 May 2007
Posts: 181
Followers: 1

Kudos [?]: 7 [0], given: 0

GMAT Tests User
What is the average speed of the car in a travel of 180Km [#permalink] New post 17 Jun 2007, 20:40
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 1 sessions
Q. What is the average speed of the car in a travel of 180Km
1) The car travelled 1st 120Km at 60Km/hr average speed
2) The car travelled last 120Km at 60Km/hr average speed
Manager
Manager
avatar
Joined: 17 Oct 2006
Posts: 53
Followers: 0

Kudos [?]: 1 [0], given: 0

 [#permalink] New post 17 Jun 2007, 21:01
I would go for C. Coz all the distance is covered under both the statements. If the question had told that first and last say 50 km (any numbers whose total was less than the total distance,) then it would have been E. But here i have to go with C.
What is OA, is there some catch?
Manager
Manager
User avatar
Joined: 15 Sep 2006
Posts: 94
Followers: 1

Kudos [?]: 3 [0], given: 0

Re: DS - Average speed of the car [#permalink] New post 18 Jun 2007, 11:25
iamba wrote:
Q. What is the average speed of the car in a travel of 180Km
1) The car travelled 1st 120Km at 60Km/hr average speed
2) The car travelled last 120Km at 60Km/hr average speed


Average speed = Total distance / Total time

Statement 1.
We have total distance, but not total time.
Not Sufficient

Statement 2
We have total distance, but only a part of the time.
Not Sufficient

Combined
We have total distance and total time. Sufficient.

Answer is C.
Manager
Manager
avatar
Joined: 21 May 2007
Posts: 120
Followers: 1

Kudos [?]: 11 [0], given: 0

 [#permalink] New post 18 Jun 2007, 12:39
E

I can give you 2 possible solutions when the 2 statements are combined.

1. A constant speed of 60 Km/hr. In this case, the average speed is 60 km/hr

2. First 60 kms in 1/2 hour.
Second 60 kms in 1.5 hours.
The last 60 kms again is travelled in 1/2 hour

Note that the first and last 120 kms are still covered in 2 hours giving the AVERAGE speed as 60

Now, 180 kms were travelled in 2.5 hours, hence avg speed = 72.
(Similarly, more solutions are possible)

Statements 1 and 2 combined cannot give you a conclusive answer. Hence E


best,
parsifal
  [#permalink] 18 Jun 2007, 12:39
    Similar topics Author Replies Last post
Similar
Topics:
3 Experts publish their posts in the topic A car was initially traveling at an average speed of 48 mile Gnpth 4 25 Jun 2014, 08:13
1 Experts publish their posts in the topic A car travels from point A to point B. The average speed guygmat 5 18 Jun 2011, 03:32
11 Experts publish their posts in the topic A car travels from point A to point B. The average speed of aiming4mba 9 26 Jul 2010, 21:46
5 Experts publish their posts in the topic A car travels from Mayville to Rome at an average speed of 3 EnterMatrix 7 18 Jul 2010, 09:53
What is the average speed of an automobile as it travels the andrehaui 3 30 May 2007, 07:13
Display posts from previous: Sort by

What is the average speed of the car in a travel of 180Km

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

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®.