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.
Nov 2007:30 AM PST
-08:30 AM PST
Learn what truly sets the UC Riverside MBA apart and how it helps in your professional growth
Nov 2211:00 AM IST
-01:00 PM IST
Do RC/MSR passages scare you? e-GMAT is conducting a masterclass to help you learn – Learn effective reading strategies Tackle difficult RC & MSR with confidence Excel in timed test environment- Nov 23
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. 
Nov 2510:00 AM EST
-11:00 AM EST
Prefer video-based learning? The Target Test Prep OnDemand course is a one-of-a-kind video masterclass featuring 400 hours of lecture-style teaching by Scott Woodbury-Stewart, founder of Target Test Prep and one of the most accomplished GMAT instructors.
18 Nov 2024, 01:30
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
50% (02:37) correct
50%
(02:10)
wrong
based on 109
sessions
History
Date
Time
Result
Not Attempted Yet
Two persons A and B run at constant speeds of a miles per hour and b miles per hour respectively. They start running toward each other at the same time from a distance of d miles. How much time will they take to meet?
(1) If A and B ran at speeds of a/2 and 2b respectively, they would take the same amount of time to meet.
(2) If they both ran at 1 mile per hour slower, they would take double the time to meet.
(1) If A and B ran at speeds of a/2 and 2b respectively, they would take the same amount of time to meet.
(2) If they both ran at 1 mile per hour slower, they would take double the time to meet.
Mod12345
Joined: 11 Nov 2024
Last visit: 24 Mar 2025
Posts: 13
Own Kudos:
Given Kudos: 4
Location: India
Schools: ISB '27 (A)
GMAT Focus 1: 695 Q88 V82 DI83 
19 Nov 2024, 03:34
Kudos
Bookmarks
It should be C. It would be 2 equations with 2 variables.
22 Nov 2024, 08:38
Kudos
Bookmarks
Bunuel
(1) If A and B ran at speeds of a/2 and 2b respectively, they would take the same amount of time to meet.
Lets say they take \(t\) hours to meet. Then:
\(\frac{a}{2}.t+ 2b.t =d \)
INSUFF.
(2) If they both ran at 1 mile per hour slower, they would take double the time to meet.
Lets say A meets at distance \(p\) when travelling at the original speed. Hence time taken to meet by A \(= \frac{p}{a}\)
Now when speed is \(1\) mile per hour slower, time taken to meet is doubled so: \(\frac{p}{a-1} = 2* \frac{p}{a}\), \( \right \) \( a=2 \)
Similarly \(b=2 \)
However we still do not know \(d.\)
INSUFF.
1+2
We still do not know \(d.\)
Time taken to meet will change based on distance.
INSUFF.
Ans E
Extra : using (ii) we know \(a=b =2\) and using (i) we know they take the same time to meet, when speed is \(1\) and \(4\) respectively.
Let's say they meet in \(1\) hr then \(1*1 + 4*1 = 5 \)
Let's say they meet in \(2\) hrs then \(1*2 + 4*2 = 10\)
Thus we see time taken to meet changes with distance.
Hope it helped.
