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

It is currently 25 Oct 2014, 18:00

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

The Kiljaro Highway is marked with Milestones denoting the

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Expert Post
1 KUDOS received
BSchool Forum Moderator
avatar
Joined: 27 Aug 2012
Posts: 1118
Followers: 87

Kudos [?]: 570 [1] , given: 107

Premium Member CAT Tests
The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 09 Jul 2013, 00:28
1
This post received
KUDOS
Expert's post
00:00
A
B
C
D
E

Difficulty:

  55% (hard)

Question Stats:

73% (03:05) correct 27% (03:06) wrong based on 84 sessions
The Kiljaro Highway is marked with Milestones denoting the distance to the town of Kiljaro. Tommy left kiljaro and drove the highway, passing the 10 km milestone at 8:30. Some time afterwards, Tommy got a phone call asking him to return home, and he made a U-turn at the 160 km milestone. At 09:A0 Tommy passed the milestone marking 70 km to Kiljaro. The variable A represents the tens digit of the minutes in 09:A0. Assuming Tommy maintained the same constant speed during the entire drive, how many kilometers did Tommy travel in one minute?

A. 240/(30+10A)
B. 240/(30+60A)
C. 240/40A
D. 220/(30+10A)
E. 220/40A

P.S: Bunuel/VeritasPrepKarishma- can you please provide an explanation and how to approach this type of questions in least possible time? It took around 4 minutes to understand and solve!
[Reveal] Spoiler: OA

_________________

UPDATED : e-GMAT SC Resources-Consolidated || ALL RC Resources-Consolidated || ALL SC Resources-Consolidated || UPDATED : AWA compilations-109 Analysis of Argument Essays || NEW !!! GMAC's IR Prep Tool

GMAT Club guide - OG 11-12-13 || Veritas Blog || Manhattan GMAT Blog


KUDOS please, if you like the post or if it helps :-)

Veritas Prep GMAT Discount CodesKnewton GMAT Discount CodesGMAT Pill GMAT Discount Codes
2 KUDOS received
Current Student
avatar
Joined: 25 Jun 2013
Posts: 14
GMAT 1: 710 Q49 V35
Followers: 0

Kudos [?]: 11 [2] , given: 2

Re: The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 09 Jul 2013, 00:45
2
This post received
KUDOS
Total distance covered away from Kilijaro: 160-10 = 150km
Total distance covered till 9:A0 while returning to Kilijaro: 160-70 = 90
Total distance covered between 8:30 and 9:A0: 150 + 90 = 240
Total time elapsed between 8:30 and 9:A0 = 30 (From 8:30 to 9:00) + 10*A = 30 + 10.A minutes
Speed per minute = 240 / (30 + 10.A)
Answer should be 'A'
2 KUDOS received
SVP
SVP
User avatar
Joined: 06 Sep 2013
Posts: 1793
Location: United States
Concentration: Finance
GMAT 1: 710 Q48 V39
WE: Corporate Finance (Investment Banking)
Followers: 16

Kudos [?]: 202 [2] , given: 310

GMAT ToolKit User
Re: The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 31 Dec 2013, 12:58
2
This post received
KUDOS
bagdbmba wrote:
The Kiljaro Highway is marked with Milestones denoting the distance to the town of Kiljaro. Tommy left kiljaro and drove the highway, passing the 10 km milestone at 8:30. Some time afterwards, Tommy got a phone call asking him to return home, and he made a U-turn at the 160 km milestone. At 09:A0 Tommy passed the milestone marking 70 km to Kiljaro. The variable A represents the tens digit of the minutes in 09:A0. Assuming Tommy maintained the same constant speed during the entire drive, how many kilometers did Tommy travel in one minute?

A. 240/(30+10A)
B. 240/(30+60A)
C. 240/40A
D. 220/(30+10A)
E. 220/40A

P.S: Bunuel/VeritasPrepKarishma- can you please provide an explanation and how to approach this type of questions in least possible time? It took around 4 minutes to understand and solve!



So he travelled first 150 km from 10 to 160km

Then he travelled 90 km more for a total of 240 km

So average time in km per minute will be expressed as

240 / (30 + 10A)

Allow me to explain. 30 minutes 'till 9am. And then 10A is cause the A is in the tens digit

So A is the correct answer

Hope it helps!
Cheers!

J :)
Expert Post
BSchool Forum Moderator
avatar
Joined: 27 Aug 2012
Posts: 1118
Followers: 87

Kudos [?]: 570 [0], given: 107

Premium Member CAT Tests
Re: The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 11 Jul 2013, 00:36
Expert's post
Bunuel-can you please come up with an explanation to help me understand it...?
_________________

UPDATED : e-GMAT SC Resources-Consolidated || ALL RC Resources-Consolidated || ALL SC Resources-Consolidated || UPDATED : AWA compilations-109 Analysis of Argument Essays || NEW !!! GMAC's IR Prep Tool

GMAT Club guide - OG 11-12-13 || Veritas Blog || Manhattan GMAT Blog


KUDOS please, if you like the post or if it helps :-)

Intern
Intern
avatar
Joined: 05 Jul 2013
Posts: 5
Followers: 0

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

Re: The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 12 Jul 2013, 03:31
Consider 8:30 am to be starting point . Then there are two journeys.

1) From the 10km mark to 160 km: Let the time taken to travel this be x

Speed =\frac{150}{x}

2) From 160km to 70 km: This journey starts at time "x" till time "9:A0"

Thus the time taken = (time from 8:30 to 9:A0) - x
= (30 + 10A) - x
Speed = \frac{(160 - 70)}{[ (30+10A) -x ]} = \frac{90}{[ (30+10A) -x ]}

But speed is uniform, so...

150/x = \frac{90}{[ (30+10A) -x ]}

Solving this gives x = \frac{150(30 + 10A)}{240}

Distance travelled in a minute = Speed = \frac{150}{x} = \frac{240}{(30 + 10A)}
Senior Manager
Senior Manager
User avatar
Joined: 13 May 2013
Posts: 476
Followers: 1

Kudos [?]: 58 [0], given: 134

Re: The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 04 Aug 2013, 13:22
The Kiljaro Highway is marked with Milestones denoting the distance to the town of Kiljaro. Tommy left kiljaro and drove the highway, passing the 10 km milestone at 8:30. Some time afterwards, Tommy got a phone call asking him to return home, and he made a U-turn at the 160 km milestone. At 09:A0 Tommy passed the milestone marking 70 km to Kiljaro. The variable A represents the tens digit of the minutes in 09:A0. Assuming Tommy maintained the same constant speed during the entire drive, how many kilometers did Tommy travel in one minute?

From the 10km mark at 8:30 to the 160km milestone back to the 70km marker at 9:A0 Tommy traveled 240 km. That right there should help rule out D and E. We know Tommy traveled at least 30 minutes and A could represent 0-5 inclusive. Tommy's speed per minute is distance/time. We know he traveled 240 km and we know he traveled a minimum of 30 minutes. Therefore, Tommy's speed = 240/30+(10*A) where 10A represents the additional number of minutes (in 10 minute intervals) that Tommy covered.

Another way to do this is to find his average speed over the total possible number of minutes he drove (between 30 and 80 minutes) then see which answer choice matches up with the possible speeds he drove. This, however, is time consuming.

Also, to put things in perspective, Tommy's average speed was 288 km/hr or 180 miles/hour. Using the above method, I ruled out a few of his other possible speeds (540km/hour and 360 km/hour and 288 km/hour) because I figured them to be unrealistically fast. You can't count on the GMAT to employ realistic numbers, however.

ANSWER: A. 240/(30+10A)
Intern
Intern
avatar
Joined: 25 Nov 2013
Posts: 24
Concentration: Marketing, International Business
GMAT Date: 02-14-2014
GPA: 2.3
WE: Other (Internet and New Media)
Followers: 1

Kudos [?]: 2 [0], given: 11

Re: The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 17 Jan 2014, 18:26
Zuch wrote:
Total distance covered away from Kilijaro: 160-10 = 150km
Total distance covered till 9:A0 while returning to Kilijaro: 160-70 = 90
Total distance covered between 8:30 and 9:A0: 150 + 90 = 240
Total time elapsed between 8:30 and 9:A0 = 30 (From 8:30 to 9:00) + 10*A = 30 + 10.A minutes
Speed per minute = 240 / (30 + 10.A)
Answer should be 'A'


Can't total distance calculated like this: 10+160+70? This equals 240 and the speed per minute would be 240/30+10A?

Please explain if I am wrong.
Intern
Intern
avatar
Joined: 05 Dec 2013
Posts: 20
Concentration: Technology
GPA: 3.95
WE: Information Technology (Venture Capital)
Followers: 0

Kudos [?]: 2 [0], given: 1

Re: The Kiljaro Highway is marked with Milestones denoting the [#permalink] New post 22 Jan 2014, 23:06
Total distance traveled between 8:30 and 9:A0 is (160-10)+(160-70)=240.

Time between 8:30 and 9:A0 is (9:00-8:30)+(9:A0-9:00)=30+A*10

Total km traveled in one minute is total kilometers traveled divided by total minutes it took to travel that distance. 240/(30+10A)
Re: The Kiljaro Highway is marked with Milestones denoting the   [#permalink] 22 Jan 2014, 23:06
    Similar topics Author Replies Last post
Similar
Topics:
8 Experts publish their posts in the topic 150,000 Members Milestone Crossed bb 33 29 Jun 2011, 20:47
highway speed vjsharma25 6 24 Mar 2011, 11:08
Interstate Highways nilesh376 5 13 May 2010, 04:41
Mary on the highway neoreaves 3 01 May 2010, 08:31
Another Milestone- Way to Go GMATCLUB ps_dahiya 2 18 Oct 2006, 07:37
Display posts from previous: Sort by

The Kiljaro Highway is marked with Milestones denoting the

  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®.