It is currently 18 Nov 2017, 11:12

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

If Danielle ran a race at a constant speed, at what time did

Author Message
TAGS:

Hide Tags

Director
Joined: 29 Nov 2012
Posts: 866

Kudos [?]: 1451 [2], given: 543

If Danielle ran a race at a constant speed, at what time did [#permalink]

Show Tags

01 Jun 2013, 02:38
2
KUDOS
3
This post was
BOOKMARKED
00:00

Difficulty:

15% (low)

Question Stats:

74% (00:53) correct 26% (01:00) wrong based on 223 sessions

HideShow timer Statistics

If Danielle ran a race at a constant speed, at what time did she finish?

(1) Danielle started the race at 8:00 a.m.

(2) At 9:30 a.m. Danielle was halfway through the race, and at 10:00 a.m., she was 2/3 of the way through the race.

[Reveal] Spoiler: OA

_________________

Click +1 Kudos if my post helped...

Amazing Free video explanation for all Quant questions from OG 13 and much more http://www.gmatquantum.com/og13th/

GMAT Prep software What if scenarios http://gmatclub.com/forum/gmat-prep-software-analysis-and-what-if-scenarios-146146.html

Kudos [?]: 1451 [2], given: 543

VP
Status: Far, far away!
Joined: 02 Sep 2012
Posts: 1120

Kudos [?]: 2364 [1], given: 219

Location: Italy
Concentration: Finance, Entrepreneurship
GPA: 3.8
Re: If Danielle ran a race at a constant speed, at what time did [#permalink]

Show Tags

01 Jun 2013, 02:43
1
KUDOS
1
This post was
BOOKMARKED
If Danielle ran a race at a constant speed, at what time did she finish?

(1) Danielle started the race at 8:00 a.m.
No info about the speed, or time.
Not sufficient

(2) At 9:30 a.m. Danielle was halfway through the race, and at 10:00 a.m., she was 2/3 of the way through the race.
This means that in 30 minutes (10:00-9:30) she runs $$\frac{2}{3}-\frac{1}{2}=\frac{1}{6}$$ of the race.
At 10:00 she has $$\frac{1}{3}$$ left to run or $$\frac{2}{6}$$ and, according to the upper calculus, she will run it in $$1$$ hour (1/6 every 30 minutes).
She will finish at 11:00 am.
Sufficient
B
_________________

It is beyond a doubt that all our knowledge that begins with experience.

Kant , Critique of Pure Reason

Tips and tricks: Inequalities , Mixture | Review: MGMAT workshop
Strategy: SmartGMAT v1.0 | Questions: Verbal challenge SC I-II- CR New SC set out !! , My Quant

Rules for Posting in the Verbal Forum - Rules for Posting in the Quant Forum[/size][/color][/b]

Kudos [?]: 2364 [1], given: 219

Senior Manager
Joined: 28 Dec 2010
Posts: 323

Kudos [?]: 267 [0], given: 33

Location: India
Re: If Danielle ran a race at a constant speed, at what time did [#permalink]

Show Tags

22 Jun 2013, 10:49
solved in 32 secs. exactly the approach by zarrolou. between 9.30 and 10 she covers 2/3 -1/2 part of the journey. Therefore we can calculate the time required to travel 1/2 of the distance and adding this time to 9.30 we get the time of finish.

Kudos [?]: 267 [0], given: 33

Senior Manager
Joined: 13 May 2013
Posts: 460

Kudos [?]: 201 [0], given: 134

Re: If Danielle ran a race at a constant speed, at what time did [#permalink]

Show Tags

30 Jul 2013, 13:55
If Danielle ran a race at a constant speed, at what time did she finish?

(1) Danielle started the race at 8:00 a.m.
This tells us nothing about when she finished, how far she ran, rate, etc.
INSUFFICIENT

(2) At 9:30 a.m. Danielle was halfway through the race, and at 10:00 a.m., she was 2/3 of the way through the race.
Lets say she ran 10 miles.
In 1.5 hours she ran 5/10 miles.
in 2.0 hours she ran roughly 6.67 miles.

Every half hour she ran (5/10) / (1/3) miles: 1.67miles. If she ran at a constant speed, that means she finished the race by 11 A.M. It's not the distance that is important but rather, the rate she runs at. If her rate is constant and she finishes the intervals at the same time, the distance she covers is irrelevant.
SUFFICIENT

(B)

Kudos [?]: 201 [0], given: 134

Non-Human User
Joined: 09 Sep 2013
Posts: 15703

Kudos [?]: 281 [0], given: 0

Re: If Danielle ran a race at a constant speed, at what time did [#permalink]

Show Tags

10 Feb 2015, 15:18
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.
_________________

Kudos [?]: 281 [0], given: 0

Manager
Joined: 18 Mar 2014
Posts: 237

Kudos [?]: 82 [0], given: 175

Location: India
Concentration: Operations, Strategy
GMAT 1: 670 Q48 V35
GPA: 3.19
WE: Information Technology (Computer Software)
Re: If Danielle ran a race at a constant speed, at what time did [#permalink]

Show Tags

03 Apr 2015, 08:16
only B is enough .
at 9.30 he had completed half race , and at 10 he had compelted 2/3 rd race so within half hour he compelted (1/2-2/3)th race. since speed is constant . Its possible to calcuate when race will over. (no need to calculate though)
_________________

Press +1 Kudos if you find this Post helpful

Kudos [?]: 82 [0], given: 175

Non-Human User
Joined: 09 Sep 2013
Posts: 15703

Kudos [?]: 281 [0], given: 0

Re: If Danielle ran a race at a constant speed, at what time did [#permalink]

Show Tags

13 Oct 2016, 07:21
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.
_________________

Kudos [?]: 281 [0], given: 0

Re: If Danielle ran a race at a constant speed, at what time did   [#permalink] 13 Oct 2016, 07:21
Display posts from previous: Sort by