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.
Sep 1507:00 PM EDT
-09:00 PM EST
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Sept. 15, 2026 - Nov. 15, 2027, 7:00pm-9:00pm EST
Sep 1712:30 AM EDT
-01:30 AM EDT
Thought your job leaves no time for GMAT prep? After multiple GMAT attempts and a demanding consulting job, Kshitij improved to 695 in under 2 months. Learn the mindset shifts, study strategy, and execution changes that made the breakthrough possible.
Sep 1801:30 AM EDT
-02:30 AM EDT
Learn how Kamakshi achieved a GMAT 675 with an impressive 96th %ile in Data Insights. Discover the unique methods and exam strategies that helped her excel in DI along with other sections for a balanced and high score.
Sep 1808:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Sep 2107:00 PM EDT
-10:00 PM EDT
Boost your GMAT score in less than one month in a live online class + 6 months access to TTP OnDemand video courses included!
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
78% (01:25) correct
22%
(01:34)
wrong
based on 225
sessions
History
Date
Time
Result
Not Attempted Yet
A man walks from B to C, a distance of x miles, at 8 miles per hour and returns at 12 miles per hour. What is his average speed?
A. 10 mph
B. 9.6 mph
C. 8.8 mph
D. 8.4 mph
E. 4 mph
_________________
A. 10 mph
B. 9.6 mph
C. 8.8 mph
D. 8.4 mph
E. 4 mph
_________________
New to the GMAT Club?
- • Questions: Question Bank | Bunuel's Signature Collection
• Tests: GMAT Club Tests | Forum Quiz
• Guides: Quantitative | Critical Reasoning | Reading Comprehension | Ultimate Quant Guide | All You Need for Quant
• Rules: Quantitative | Verbal
D= Distance between B and C
Time to cover the round trip = D/8 + D/12 = 5D/24
Total Distance covered = 2D
Avg Speed = Total Distance / Total Time
=2D*24/5D
=9.6 mph
Answer: B
Time to cover the round trip = D/8 + D/12 = 5D/24
Total Distance covered = 2D
Avg Speed = Total Distance / Total Time
=2D*24/5D
=9.6 mph
Answer: B
Posts: 1
Total distance covered = 2x
Time taken 12 miles / hour = x/12 hrs
Time taken @ 8 miles / hour = x/8 hrs
Avg speed = 2x / (x/8 + x/12) = 9.6 mph
Ans is B
Time taken 12 miles / hour = x/12 hrs
Time taken @ 8 miles / hour = x/8 hrs
Avg speed = 2x / (x/8 + x/12) = 9.6 mph
Ans is B
Please be careful don't follow the formula (a+b)/2 as this is a case of weighted average
A simple approach would be consider
Take LCM of the avg speeds given i.e. of 8 and 12 which would be 24
Now suppose the distance from B to C as 24 then total distance would be 24*2=48
Similarly,
Time=Distance/Speed so, Total Time = 24/8+24/12=5 hrs
Now,
Avg Speed=Total Distance/Total Time=48/5=9.6
Hence the answer is B
Please consider a kudos if this was helpful
A simple approach would be consider
Take LCM of the avg speeds given i.e. of 8 and 12 which would be 24
Now suppose the distance from B to C as 24 then total distance would be 24*2=48
Similarly,
Time=Distance/Speed so, Total Time = 24/8+24/12=5 hrs
Now,
Avg Speed=Total Distance/Total Time=48/5=9.6
Hence the answer is B
Please consider a kudos if this was helpful
Posts: 386
just use the formula (2*s1*s2)/(s1+s2) as avrage speed will be independant of the distance x.
s1 - speed of going from b to c = 8mph
s2 - speed of going from c to b = 12mph
s1 - speed of going from b to c = 8mph
s2 - speed of going from c to b = 12mph
ScottTargetTestPrep
Expert
Target Test Prep Representative
Joined: 14 Oct 2015
Last visit: 15 Sep 2026
Posts: 22,740
Status:Founder & CEO
Affiliations: Target Test Prep
Location: United States (CA)
Expert reply
Posts: 22,740
Bunuel
We can use the formula:
average = (total distance)/(total time)
average = 2x/(x/8 + x/12)
average = 2x/(3x/24 + 2x/24)
average = 2x/(5x/24)
average = 48x/(5x) = 9.6
Answer: B
_________________
Scott Woodbury-Stewart | Founder and
CEO |
[email protected]
See why Target Test Prep is the top rated GMAT course on GMAT Club. Read Our Reviews
Posts: 84
assume x= 48
48*2/(10)= 9.6
48*2/(10)= 9.6
Automated notice from GMAT Club BumpBot:
A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
_________________
A member just gave Kudos to this thread, showing it’s still useful. I’ve bumped it to the top so more people can benefit. Feel free to add your own questions or solutions.
This post was generated automatically.
_________________
If this question felt shaky,
try an adaptive mini quiz of similar problems in
GMAT Club Forum Quiz →. Free plan gives 5 questions per day.
Moderator:
Announcements
Monday, Sep 14, 2026
11:30am NY / 3:30pm London / 9pm Mumbai
Subscribe to GMAT Club for New Podcast Episodes, Debriefs, & Insightful Sessions on GMAT Preparation
Tuck at Dartmouth
AI at Dartmouth Tuck: How the School Is Preparing Leaders for the Age of Artificial Intelligence
Inside the courses, research, and hands-on learning defining wise, decisive leadership in an AI-driven world.
Read More
Inside the courses, research, and hands-on learning defining wise, decisive leadership in an AI-driven world.
Read More
Top 5 GMAT Debrief Videos
Success stories and strategies from high-scoring candidates.