Events & Promotions
|
|
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
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
May 1211:00 AM PDT
-12:00 PM PDT
Ready to test your GRE vocabulary skills in a fun and competitive live setting? Join our interactive GRE Vocabulary Quiz LIVE on YouTube! In this special session, you'll tackle 20 GRE-level vocabulary questions under timed conditions- May 14
08:30 AM PDT
-09:30 AM PDT
Struggling with Boldface or Paradox questions in GMAT Critical Reasoning (CR)? Boldface and Paradox CR questions are often overlooked amidst the other more common GMAT CR question types. But mastering these can significantly boost your Verbal score. - May 14
10:00 AM PDT
-11:00 AM PDT
GMAT Verbal Practice question quiz. Solve 20 GMAT Focus practice questions written by GMAT Ninja. Take this GMAT practice test live with peers in timed conditions, analyze your GMAT study progress, and see where you stand in the GMAT student pool. 
May 1411:30 AM EDT
-12:30 PM EDT
Is INSEAD your dream b-school and you're looking for solid prep and application strategies to get there? Check out Barkavi’s end-to-end journey to know how she did! Get insights into the INSEAD admissions process, know what Adcoms look at, and more!- May 15
10:00 AM PDT
-11:00 AM PDT
Struggling to finish the GMAT on time? You’re not alone. The #1 reason students score lower than expected on the GMAT isn’t lack of knowledge or silly mistakes—it’s running out of time. 
May 1609:00 PM PDT
-10:00 PM PDT
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
May 1711:00 AM IST
-01:00 PM IST
Attend this session to learn how to Deconstruct arguments, Pre-Think Author’s Assumptions, and apply Negation Test.- May 18
11:00 AM IST
-01:00 PM IST
Attend this free GMAT Algebra Webinar and learn how to master the most challenging Inequalities and Absolute Value problems with ease.
16 Sep 2014, 00:57
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
73% (02:38) correct
27%
(02:42)
wrong
based on 81
sessions
History
Date
Time
Result
Not Attempted Yet
If a car traveled the first third of the distance at 80 km/h, the second third at 24 km/h, and the final third at 48 km/h, what was the car's average (arithmetic mean) speed for the entire journey?
A. 36 km/h
B. 40 km/h
C. 42 km/h
D. 44 km/h
E. 50 km/h
A. 36 km/h
B. 40 km/h
C. 42 km/h
D. 44 km/h
E. 50 km/h
16 Sep 2014, 00:57
Kudos
Bookmarks
Official Solution:
If a car traveled the first third of the distance at 80 km/h, the second third at 24 km/h, and the final third at 48 km/h, what was the car's average (arithmetic mean) speed for the entire journey?
A. 36 km/h
B. 40 km/h
C. 42 km/h
D. 44 km/h
E. 50 km/h
Let the total distance be \(3x\) kilometers. Then, the total time taken is given by \(\frac{x}{80} + \frac{x}{24} + \frac{x}{48} = \frac{18x}{240}\) hours.
The average speed is calculated as \(\frac{total \ distance}{total \ time}\). Thus, average speed \(= \frac{3x}{\frac{18x}{240}} = \frac{240*3}{18} = 40\) km/h.
Answer: B
If a car traveled the first third of the distance at 80 km/h, the second third at 24 km/h, and the final third at 48 km/h, what was the car's average (arithmetic mean) speed for the entire journey?
A. 36 km/h
B. 40 km/h
C. 42 km/h
D. 44 km/h
E. 50 km/h
Let the total distance be \(3x\) kilometers. Then, the total time taken is given by \(\frac{x}{80} + \frac{x}{24} + \frac{x}{48} = \frac{18x}{240}\) hours.
The average speed is calculated as \(\frac{total \ distance}{total \ time}\). Thus, average speed \(= \frac{3x}{\frac{18x}{240}} = \frac{240*3}{18} = 40\) km/h.
Answer: B
General Discussion
