It is currently 21 Sep 2017, 16:22

### 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

# Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef

Author Message
TAGS:

### Hide Tags

Director
Status: I don't stop when I'm Tired,I stop when I'm done
Joined: 11 May 2014
Posts: 569

Kudos [?]: 2405 [1], given: 220

GPA: 2.81
Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef [#permalink]

### Show Tags

17 Jun 2017, 09:29
1
KUDOS
Top Contributor
4
This post was
BOOKMARKED
00:00

Difficulty:

45% (medium)

Question Stats:

68% (01:59) correct 32% (02:02) wrong based on 333 sessions

### HideShow timer Statistics

Al and Ben are drivers for SD Trucking Company. One snowy day, Ben left SD at 8:00 a.m. heading east and Al left SD at 11:00 a.m. heading west. At a particular time later that day, the dispatcher retrieved data from SD’s vehicle tracking system. The data showed that, up to that time, Al had averaged 40 miles per hour and Ben had averaged 20 miles per hour. It also showed that Al and Ben had driven a combined total of 240 miles. At what time did the dispatcher retrieve data from the vehicle tracking system?

A. 1:00 p.m.
B. 2:00 p.m.
C. 3:00 p.m.
D. 5:00 p.m.
E. 6:00 p.m.
[Reveal] Spoiler: OA

_________________

Md. Abdur Rakib

Please Press +1 Kudos,If it helps
Sentence Correction-Collection of Ron Purewal's "elliptical construction/analogies" for SC Challenges

Kudos [?]: 2405 [1], given: 220

Director
Joined: 07 Dec 2014
Posts: 801

Kudos [?]: 224 [0], given: 10

Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef [#permalink]

### Show Tags

17 Jun 2017, 09:44
AbdurRakib wrote:
Al and Ben are drivers for SD Trucking Company. One snowy day, Ben left SD at 8:00 a.m. heading east and Al left SD at 11:00 a.m. heading west. At a particular time later that day, the dispatcher retrieved data from SD’s vehicle tracking system. The data showed that, up to that time, Al had averaged 40 miles per hour and Ben had averaged 20 miles per hour. It also showed that Al and Ben had driven a combined total of 240 miles. At what time did the dispatcher retrieve data from the vehicle tracking system?

A. 1:00 p.m.
B. 2:00 p.m.
C. 3:00 p.m.
D. 5:00 p.m.
E. 6:00 p.m.

3 hours+(240-3*20)/(40+20) hours=6 hours
2:00 pm
B

Kudos [?]: 224 [0], given: 10

Director
Joined: 04 Dec 2015
Posts: 696

Kudos [?]: 264 [4], given: 261

Location: India
Concentration: Technology, Strategy
Schools: ISB '19, IIMA , IIMB, XLRI
WE: Information Technology (Consulting)
Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef [#permalink]

### Show Tags

17 Jun 2017, 09:47
4
KUDOS
1
This post was
BOOKMARKED
AbdurRakib wrote:
Al and Ben are drivers for SD Trucking Company. One snowy day, Ben left SD at 8:00 a.m. heading east and Al left SD at 11:00 a.m. heading west. At a particular time later that day, the dispatcher retrieved data from SD’s vehicle tracking system. The data showed that, up to that time, Al had averaged 40 miles per hour and Ben had averaged 20 miles per hour. It also showed that Al and Ben had driven a combined total of 240 miles. At what time did the dispatcher retrieve data from the vehicle tracking system?

A. 1:00 p.m.
B. 2:00 p.m.
C. 3:00 p.m.
D. 5:00 p.m.
E. 6:00 p.m.

Ben started at 8 am and given his avg speed is 20 miles per hour.

Al started at 11 am and given his avg speed is 40 miles per hour.

Ben started 3 hours earlier than Al.

Therefore distance covered by Ben in 3 hours = 20 x 3 = 60 miles

Given Total distance covered by both Ben and Al = 240 miles.

Distance covered by Ben and Al after Al started his journey at 11 am = 240 - 60 = 180 miles.

Relative speed = 20 + 40 = 60 miles per hour --------- (Ben and Al are driving in opposite directions hence their speeds are added)

Time = Total distance / Relative speed

Time = $$\frac{180}{60}$$ = 3 hours.

Time when dispatcher retrieved data = 11:00 am + 3 hours = 2:00 pm. Answer (B)...

Kudos [?]: 264 [4], given: 261

SVP
Joined: 12 Sep 2015
Posts: 1746

Kudos [?]: 2290 [0], given: 355

Re: Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef [#permalink]

### Show Tags

28 Jun 2017, 07:14
Top Contributor
1
This post was
BOOKMARKED
AbdurRakib wrote:
Al and Ben are drivers for SD Trucking Company. One snowy day, Ben left SD at 8:00 a.m. heading east and Al left SD at 11:00 a.m. heading west. At a particular time later that day, the dispatcher retrieved data from SD’s vehicle tracking system. The data showed that, up to that time, Al had averaged 40 miles per hour and Ben had averaged 20 miles per hour. It also showed that Al and Ben had driven a combined total of 240 miles. At what time did the dispatcher retrieve data from the vehicle tracking system?

A. 1:00 p.m.
B. 2:00 p.m.
C. 3:00 p.m.
D. 5:00 p.m.
E. 6:00 p.m.

(Ben's travel distance) + (Al's travel distance) = 240 miles

Let t = Al's travel time (in hours)
So, t + 3= Ben's travel time (since Ben spent 3 more hours driving)

Distance = (rate)(time)

So, our word equation becomes...
(20)(t + 3) = (40)(t)
Expand: 20t + 60 = 40t
Subtract 20t from both sides: 60 = 20t
Solve: t = 3
So, AL traveled for 3 hours (which means BEN traveled for 6 hours)

So, the dispatcher retrieved data at 2pm (since 8am + 6 hours = 2pm)

[Reveal] Spoiler:
B

RELATED VIDEOS

_________________

Brent Hanneson – Founder of gmatprepnow.com

Kudos [?]: 2290 [0], given: 355

Senior Manager
Joined: 22 Aug 2013
Posts: 421

Kudos [?]: 118 [0], given: 259

Location: India
Re: Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef [#permalink]

### Show Tags

02 Jul 2017, 21:28
Both are going in opposite directions. In 3 hours, Ben has already covered = 20*3 = 60 miles.

Now, at 11 am, both have started moving, Al covering 40 miles in 1 hour while Ben covering 20 miles per hour, so from 11 am onwards, both are now increasing the distance between them by (40+20) = 60 miles every hour.

So out of the given 240 miles distance between them, 60 miles is accounted for by Ben from 8 to 11 am. After that they have covered (240-60) = 180 miles, but their relative speed is 60 mph. So time taken = 180/60 = 3 hours more, after 11 am

So the time must be 2.00 pm. Hence B answer

Kudos [?]: 118 [0], given: 259

Intern
Joined: 29 Jun 2017
Posts: 1

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

Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef [#permalink]

### Show Tags

03 Jul 2017, 10:40
1
KUDOS
Lets say Ben drove "y" hours and Al drove "x" hours
We know that the sum of both they're hours took them to drive 240 miles
40x+20y= 240
And we know that Al left 3 hours after Ben
y=x+3
So we just replace y in the first equation
40x+20(x+3)=240
40x+20x+60=240
60x=180
x=3

Since AL left at 11, then 11+3 means the dispatcher retrieved the data at 2pm or 14.00

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

Status: It's now or never
Joined: 10 Feb 2017
Posts: 233

Kudos [?]: 25 [0], given: 49

Location: India
GMAT 1: 650 Q40 V39
GPA: 3
WE: Consulting (Consulting)
Re: Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef [#permalink]

### Show Tags

02 Sep 2017, 00:32
The answer is 'B' - 2:00PM. I will only try to explain this problem practically:

Time taken to travel ---> 8am - 9am - 10am - 11am - 12am - 1pm - 2 pm
Al (distance covered @20km/h 20km 40 60 . 80 . 100 . 120 ----
Ben (distance covered @40km/h) . - - - 0 . 40kms 80 . 120

Total distance covered 240kmph by both after 1pm, thus 2PM is answer.
_________________

Class of 2019: Mannheim Business School
Class 0f 2020: HHL Leipzig

Kudos [?]: 25 [0], given: 49

Re: Al and Ben are drivers for SD Trucking Company. One snowy day, Ben lef   [#permalink] 02 Sep 2017, 00:32
Similar topics Replies Last post
Similar
Topics:
10 A truck driver drove for 2 days. On the second day, he drove 3 hours 3 22 Mar 2017, 11:17
9 A will was written such that an estate would be divided among five ben 11 17 Aug 2016, 05:47
4 If Ben were to lose the championship, Mike would be the winner with a 20 01 Aug 2015, 02:40
7 Ben is driving on the highway at x miles per hour. (One mile equals 5, 4 08 Feb 2017, 11:25
51 Abel can complete a work in 10 days, Ben in 12 days and Carl 15 06 Jun 2017, 19:14
Display posts from previous: Sort by