BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Police Offends The Dog

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

Police Offends The Dog

by sanju09 » Mon Mar 02, 2009 5:21 am
A police car, with their dog, who runs faster than the police car, starts chasing the fleeing offenders, when the offenders’ car, which is not running as fast as the police car, is at a straight road distance of 10 miles from the police car and the dog. As things start, the dog continues to run from the police car to the offenders’ car, and back to the police car and then to the offenders’ car, and so on till the police catches the offenders. What is the total distance in miles that the dog runs in the whole process?

(1) The police car runs 5 miles per hour faster than the offenders’ car.

(2) The dog runs at the speed of 72 miles per hour.
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Source: — Data Sufficiency |
Master | Next Rank: 500 Posts
Posts: 418
Joined: Wed Jun 11, 2008 5:29 am
Thanked: 65 times

by bluementor » Mon Mar 02, 2009 6:05 am
IMO E.

I'm just qualitatively answering this question. The missing info here is the relative speed of the dog to either of the cars (or the individual car speeds).

If the dog is only slightly faster than the police car, the distance travelled by the dog and the police car will not be that different.

And, if the dog is a lot more faster than the police car, the dog will be able to run a longer distance while waiting for the cops to reach the offenders.

So my guess is without knowing the speed of either of the cars, it wont be possible to work out the distance travelled by the dog. Hence E.

-BM-
Top
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

by sanju09 » Mon Mar 02, 2009 6:37 am
bluementor wrote:IMO E.

I'm just qualitatively answering this question. The missing info here is the relative speed of the dog to either of the cars (or the individual car speeds).

If the dog is only slightly faster than the police car, the distance travelled by the dog and the police car will not be that different.

And, if the dog is a lot more faster than the police car, the dog will be able to run a longer distance while waiting for the cops to reach the offenders.

So my guess is without knowing the speed of either of the cars, it wont be possible to work out the distance travelled by the dog. Hence E.

:roll: [spoiler]Let's count on it![/spoiler]

-BM-
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
User avatar
Master | Next Rank: 500 Posts
Posts: 319
Joined: Wed Feb 04, 2009 10:32 am
Location: Delhi
Thanked: 84 times
Followed by:9 members

Re: Police Offends The Dog

by sureshbala » Mon Mar 02, 2009 3:18 pm
sanju09 wrote:A police car, with their dog, who runs faster than the police car, starts chasing the fleeing offenders, when the offenders’ car, which is not running as fast as the police car, is at a straight road distance of 10 miles from the police car and the dog. As things start, the dog continues to run from the police car to the offenders’ car, and back to the police car and then to the offenders’ car, and so on till the police catches the offenders. What is the total distance in miles that the dog runs in the whole process?

(1) The police car runs 5 miles per hour faster than the offenders’ car.

(2) The dog runs at the speed of 72 miles per hour.
The answer is C.

It is clear from the given question that police car has to travel 10 miles more than the offender's car in order to catch him. From the first statement, since police care travels 5 miles more in 1 hr, the police will catch up with the offender in 2 hrs.

So the dog will be traveling to and fro for these 2 hrs. But in order to give the distance traveled by the dog in 2 hrs we need its speed as well, which is given in statement 2.

Hence using both we can conclude that the dog traveled 72x2 = 144 miles
Top
Master | Next Rank: 500 Posts
Posts: 418
Joined: Wed Jun 11, 2008 5:29 am
Thanked: 65 times

Re: Police Offends The Dog

by bluementor » Tue Mar 03, 2009 12:51 am
sureshbala wrote:
The answer is C.

It is clear from the given question that police car has to travel 10 miles more than the offender's car in order to catch him. From the first statement, since police care travels 5 miles more in 1 hr, the police will catch up with the offender in 2 hrs.

So the dog will be traveling to and fro for these 2 hrs. But in order to give the distance traveled by the dog in 2 hrs we need its speed as well, which is given in statement 2.

Hence using both we can conclude that the dog traveled 72x2 = 144 miles
Sureshbala, you are right. I didnt realize that the distances travelled by the cars are also relative (i.e. 10 miles more), as you have clearly pointed out. In this case, we wouldnt need info on the actual speeds..Thanks.

Sanju, what's the OA?

-BM-
Top
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

by sanju09 » Wed Oct 23, 2013 1:58 am
bluementor wrote:
sureshbala wrote:
The answer is C.

It is clear from the given question that police car has to travel 10 miles more than the offender's car in order to catch him. From the first statement, since police care travels 5 miles more in 1 hr, the police will catch up with the offender in 2 hrs.

So the dog will be traveling to and fro for these 2 hrs. But in order to give the distance traveled by the dog in 2 hrs we need its speed as well, which is given in statement 2.

Hence using both we can conclude that the dog traveled 72x2 = 144 miles
Sureshbala, you are right. I didnt realize that the distances travelled by the cars are also relative (i.e. 10 miles more), as you have clearly pointed out. In this case, we wouldnt need info on the actual speeds..Thanks.

Sanju, what's the OA?

-BM-
[spoiler]It's made up for C.[/spoiler]
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 3380
Joined: Mon Mar 03, 2008 1:20 am
Thanked: 2256 times
Followed by:1535 members
GMAT Score:800

by lunarpower » Thu Oct 24, 2013 3:22 am
That is one fast dog.

Fastest land animal ever, in fact. (Cheetahs only run about 70 miles an hour.)

Hmm.
Ron has been teaching various standardized tests for 20 years.

--

Pueden hacerle preguntas a Ron en castellano
Potete chiedere domande a Ron in italiano
On peut poser des questions à Ron en français
Voit esittää kysymyksiä Ron:lle myös suomeksi

--

Quand on se sent bien dans un vêtement, tout peut arriver. Un bon vêtement, c'est un passeport pour le bonheur.

Yves Saint-Laurent

--

Learn more about ron
Top
User avatar
GMAT Instructor
Posts: 3650
Joined: Wed Jan 21, 2009 4:27 am
Location: India
Thanked: 267 times
Followed by:80 members
GMAT Score:760

by sanju09 » Thu Oct 24, 2013 4:41 am
lunarpower wrote:That is one fast dog.

Fastest land animal ever, in fact. (Cheetahs only run about 70 miles an hour.)

Hmm.
What do you know about the ETS's Dream Dog? :D
The mind is everything. What you think you become. -Lord Buddha



Sanjeev K Saxena
Quantitative Instructor
The Princeton Review - Manya Abroad
Lucknow-226001

www.manyagroup.com
Top
Post new topic Post Reply
• Page 1 of 1