It is currently 01 Oct 2020, 01:14
My Tests

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.

Two cars started from the same point and traveled on a strai

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 13441
Followers: 292

Kudos [?]: 3418 [0], given: 12320

CAT Tests
Two cars started from the same point and traveled on a strai [#permalink] New post 24 May 2019, 01:54
Expert's post
Two cars started from the same point and traveled on a straight course in opposite directions for exactly 2 hours, at which time they were 208 miles apart. If one car traveled, on average, 8 miles per hour faster than the other car, what was the average speed of each car for the 2-hour trip?

[Reveal] Spoiler: OA
48 mph and 56 mph


Math Review
Question: 14
Page: 244
Difficulty: medium

_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

4 KUDOS received
GRE Instructor
User avatar
Joined: 10 Apr 2015
Posts: 3841
Followers: 149

Kudos [?]: 4514 [4] , given: 69

Re: Two cars started from the same point and traveled on a strai [#permalink] New post 25 May 2019, 04:16
4
This post received
KUDOS
Expert's post
Carcass wrote:
Two cars started from the same point and traveled on a straight course in opposite directions for exactly 2 hours, at which time they were 208 miles apart. If one car traveled, on average, 8 miles per hour faster than the other car, what was the average speed of each car for the 2-hour trip?

[Reveal] Spoiler: OA
48 mph and 56 mph


Math Review
Question: 14
Page: 244
Difficulty: medium


One car traveled, on average, 8 miles per hour faster than the other car
Let x = speed of slower car (in miles per hour)
So, x + 8 = speed of faster car (in miles per hour)

Two cars started from the same point and traveled on a straight course in opposite directions for exactly 2 hours, at which time they were 208 miles apart.
This is an expanding gap question
The distance between cars EXPANDS at a rate of x + x + 8 miles per hour
Simplify: the rate of expansion = 2x + 8 miles per hour

distance = (time)(rate)
We can write: 208 = (2)(2x + 8)
Expand: 208 = 4x + 16
Subtract 16 from both sides: 192 = 4x
Solve: x = 48


The slower car traveled at 48 miles per hour
The faster car traveled at 56 miles per hour

RELATED VIDEO FROM MY COURSE

_________________

Brent Hanneson – Creator of greenlighttestprep.com
If you enjoy my solutions, you'll like my GRE prep course.
Image
Sign up for GRE Question of the Day emails

Senior Manager
Senior Manager
Joined: 17 Aug 2019
Posts: 267
Followers: 2

Kudos [?]: 36 [0], given: 65

Re: Two cars started from the same point and traveled on a strai [#permalink] New post 01 Oct 2019, 00:18
"what was the "average speed" of each car for the 2-hour trip"

Here the word average speed confused me because Avg. speed = Total Distance/total time
when we cal 208/2= 104
How can I differentiate?
Founder
Founder
User avatar
Joined: 18 Apr 2015
Posts: 13441
Followers: 292

Kudos [?]: 3418 [0], given: 12320

CAT Tests
Re: Two cars started from the same point and traveled on a strai [#permalink] New post 01 Oct 2019, 00:30
Expert's post
read here https://www.wikihow.com/Calculate-Average-Speed

Let me know if now you got it.

regards
_________________

Need Practice? 20 Free GRE Quant Tests available for free with 20 Kudos
GRE Prep Club Members of the Month: Each member of the month will get three months free access of GRE Prep Club tests.

Re: Two cars started from the same point and traveled on a strai   [#permalink] 01 Oct 2019, 00:30
Display posts from previous: Sort by

Two cars started from the same point and traveled on a strai

  Question banks Downloads My Bookmarks Reviews Important topics  


cron

GRE Prep Club Forum Home| About| Terms and Conditions and Privacy Policy| GRE Prep Club Rules| Contact

Powered by phpBB © phpBB Group

Kindly note that the GRE® test is a registered trademark of the Educational Testing Service®, and this site has neither been reviewed nor endorsed by ETS®.