It is currently 18 Jan 2018, 06:15

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.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

Kevin drove from A to B at a constant speed of 60 mph. Once he reache

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Senior Manager
Senior Manager
User avatar
G
Joined: 03 Apr 2013
Posts: 292

Kudos [?]: 52 [0], given: 862

Location: India
Concentration: Marketing, Finance
Schools: Simon '20
GMAT 1: 740 Q50 V41
GPA: 3
GMAT ToolKit User
Re: Kevin drove from A to B at a constant speed of 60 mph. Once he reache [#permalink]

Show Tags

New post 12 Dec 2017, 01:00
Bunuel wrote:
Bunuel wrote:
Kevin drove from A to B at a constant speed of 60 mph. Once he reached B, he turned right around with pause, and returned to A at a constant speed of 80 mph. Exactly 4 hours before the end of his trip, he was still approaching B, only 15 miles away from it. What is the distance between A and B?

A. 275 mi
B. 300 mi
C. 320 mi
D. 350 mi
E. 390 mi



Kudos for a correct solution.


MAGOOSH OFFICIAL SOLUTION:

In the last 15 miles of his approach to B, Kevin was traveling at 60 mph, so he traveled that distance in ¼ hr, or 15 minutes. That means, when he arrived at B, 15 minutes had elapsed, and he took (4 hr) – (15 min) = 3.75 hr to drive the distance D at 80 mph. It will be easier to leave that time in the form (4 hr) – (15 min).

D = RT = (80 mph)[ (4 hr) – (15 min)] = 320 mi – 20 mi = 300 mi

Answer = (B)


mikemcgarry
shouldn't the question say "without pause"? Because if there is a pause, then without knowing for how much time he paused, we can't find the distance
_________________

Spread some love..Like = +1 Kudos :)

Kudos [?]: 52 [0], given: 862

Magoosh Discount CodesOptimus Prep Discount CodesMath Revolution Discount Codes
Director
Director
User avatar
P
Joined: 13 Mar 2017
Posts: 560

Kudos [?]: 145 [0], given: 64

Location: India
Concentration: General Management, Entrepreneurship
GPA: 3.8
WE: Engineering (Energy and Utilities)
Re: Kevin drove from A to B at a constant speed of 60 mph. Once he reache [#permalink]

Show Tags

New post 12 Dec 2017, 02:35
Bunuel wrote:
Kevin drove from A to B at a constant speed of 60 mph. Once he reached B, he turned right around with pause, and returned to A at a constant speed of 80 mph. Exactly 4 hours before the end of his trip, he was still approaching B, only 15 miles away from it. What is the distance between A and B?

A. 275 mi
B. 300 mi
C. 320 mi
D. 350 mi
E. 390 mi



Kudos for a correct solution.


Let the distance between A and B be x.
So, Time taken from A to B = x/60
Time taken from B to A = x/80
Total time taken = x/60 + x/80

So, time taken 4 hours before completing the trip = x/60 + x/80 - 4

distance traveled 4 hours before completing the trip = (x/60 + x/80 - 4)*60 as Kevin was approaching B.
Also acc. to question, distance traveled 4 hours before completing the trip = x - 15

So, (x/60 + x/80 - 4)*60 = x - 15
x = 300 mi

Answer B
_________________

MBA Social Network : WebMaggu

Appreciate by Clicking +1 Kudos ( Lets be more generous friends.)

Kudos [?]: 145 [0], given: 64

Expert Post
Magoosh GMAT Instructor
User avatar
G
Joined: 28 Dec 2011
Posts: 4643

Kudos [?]: 9271 [0], given: 117

Re: Kevin drove from A to B at a constant speed of 60 mph. Once he reache [#permalink]

Show Tags

New post 12 Dec 2017, 16:22
ShashankDave wrote:
mikemcgarry
shouldn't the question say "without pause"? Because if there is a pause, then without knowing for how much time he paused, we can't find the distance

Dear ShashankDave,

Yes, that's a typo. Apparently it wasn't copied correctly from the source. I made the correction to the problem at the top of the thread. Thank you for pointing this out.

Mike :-)
_________________

Mike McGarry
Magoosh Test Prep

Image

Image

Education is not the filling of a pail, but the lighting of a fire. — William Butler Yeats (1865 – 1939)

Kudos [?]: 9271 [0], given: 117

Re: Kevin drove from A to B at a constant speed of 60 mph. Once he reache   [#permalink] 12 Dec 2017, 16:22

Go to page   Previous    1   2   [ 23 posts ] 

Display posts from previous: Sort by

Kevin drove from A to B at a constant speed of 60 mph. Once he reache

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne

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®.