It is currently 17 Jan 2018, 03:15

### 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

# Two cars run in opposite directions on a circular track. Car A travels

Author Message
TAGS:

### Hide Tags

Intern
Joined: 08 Aug 2015
Posts: 49

Kudos [?]: 11 [0], given: 41

Location: India
Concentration: Strategy, Marketing
GMAT 1: 680 Q49 V34
GPA: 3
WE: Marketing (Internet and New Media)
Re: Two cars run in opposite directions on a circular track. Car A travels [#permalink]

### Show Tags

21 Jul 2017, 06:20
I could not solve this due to my lack of understanding of nomenclature in the question. I could not understand what $$6\pi$$ is.

Is it simply 6<pi>? or is it like square of six <pi>?

Thanks.

Kudos [?]: 11 [0], given: 41

Math Expert
Joined: 02 Sep 2009
Posts: 43304

Kudos [?]: 139252 [0], given: 12781

Re: Two cars run in opposite directions on a circular track. Car A travels [#permalink]

### Show Tags

21 Jul 2017, 06:36
vp101 wrote:
I could not solve this due to my lack of understanding of nomenclature in the question. I could not understand what $$6\pi$$ is.

Is it simply 6<pi>? or is it like square of six <pi>?

Thanks.

It's $$6\pi$$, so 6 multiplied by pi.
Attachment:

2017-07-21_1835.png [ 2.51 KiB | Viewed 286 times ]

Does your screen show it in different way?
_________________

Kudos [?]: 139252 [0], given: 12781

Intern
Joined: 08 Aug 2015
Posts: 49

Kudos [?]: 11 [0], given: 41

Location: India
Concentration: Strategy, Marketing
GMAT 1: 680 Q49 V34
GPA: 3
WE: Marketing (Internet and New Media)
Re: Two cars run in opposite directions on a circular track. Car A travels [#permalink]

### Show Tags

21 Jul 2017, 06:41
Sorry Bunuel, but I think this was a problem with my browser. I am sure there is a way in which pi can be depicted by using the forward slash keys. I pasted this URL in a different browser and my problem was solved! Thanks for the reply!

Kudos [?]: 11 [0], given: 41

Intern
Joined: 13 Jun 2017
Posts: 1

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

Re: Two cars run in opposite directions on a circular track. Car A travels [#permalink]

### Show Tags

21 Jul 2017, 07:00
LCM of (L/a, ;L/b) is answer. L- Length of track; a- speed of car A, b- speed of car B

LCM (12pi/6pi, 12pi/8pi) = LCM (2, 1.5) = 6 (ANSWER)

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

Intern
Joined: 21 Sep 2016
Posts: 28

Kudos [?]: 2 [0], given: 261

Re: Two cars run in opposite directions on a circular track. Car A travels [#permalink]

### Show Tags

15 Sep 2017, 18:33
Didn't think about the concept of relative speed. Didn't remember it, so I solved this in another way.

We know the length of the track is 12pi and we also know the average speed of both A and B.
So, in order for them to have ran a complete lap, the (average speed * time) / length of the track (as in, total distance) should be an integer, though naturally not the same for both of them.

The lowest number in the options provided is 6 hours, hence D is our answer.

Kudos [?]: 2 [0], given: 261

Re: Two cars run in opposite directions on a circular track. Car A travels   [#permalink] 15 Sep 2017, 18:33

Go to page   Previous    1   2   [ 25 posts ]

Display posts from previous: Sort by