Forum Home > GMAT > Quantitative > Problem Solving (PS)
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 0810:00 AM PDT
-11:00 AM PDT
Paid vs Free GMAT Resources: "What's Best for You?" This concise guide breaks down the pros and cons of both free and paid study materials, helping you make an informed decision for your GMAT journey.
Sep 0811:00 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.
Aug 3103:00 PM EDT
-11:59 PM EDT
For a limited time use code FALL20 to save on prep. Valid on Complete Course, Advanced Course, Bootcamp Course, Tutoring, and the Executive Assessment Course. This discount ends September 16th.
Sep 1211:00 AM EDT
-12:00 PM EDT
Have you ever wondered how to score a PERFECT 805 on the GMAT? Meet Julia, a banking professional who used the Target Test Prep course to achieve this incredible feat. Julia's story is nothing short of an inspiration.
Sep 1310:00 AM EDT
-11:00 AM EDT
More and more TTP students are earning impressive scores on the GMAT. Now is the perfect time to join the many GMAT students who made the switch to TTP and surpassed their wildest expectations on test day.- Sep 14
11:00 AM IST
-01:00 PM IST
Text – 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
Chan and Mieko drove separate cars along the entire length of a certai
[#permalink]
15 May 2017, 02:08
15 May 2017, 02:08
27
Bookmarks
Show timer
00:00
A
B
C
D
E
Difficulty:
15%
(low)
Question Stats:
78% (01:13) correct
22%
(01:22)
wrong
based on 1340
sessions
Chan and Mieko drove separate cars along the entire length of a certain route. If Chan made the trip in 15 minutes, how many minutes did it take Mieko to make the same trip?
(1) Mieko’s average speed for the trip was 3/4 of Chan’s average speed.
(2) The route is 14 miles long.
(1) Mieko’s average speed for the trip was 3/4 of Chan’s average speed.
(2) The route is 14 miles long.
Re: Chan and Mieko drove separate cars along the entire length of a certai
[#permalink]
15 May 2017, 02:17
15 May 2017, 02:17
3
Kudos
Statement 1st- Chan's speed : Mieko's speed = 4:3 and for same distance speed is inversely proportional to time => c's time : m's time =3:4 and 3-> 15 minutes that implies 4 part represents 20 minutes and hence sufficient.
Statement 2nd is clearly insufficient -> OPTION A
Statement 2nd is clearly insufficient -> OPTION A
GMAT Club Legend
Joined: 12 Sep 2015
Posts: 6804
Given Kudos: 799
Location: Canada
Re: Chan and Mieko drove separate cars along the entire length of a certai
[#permalink]
30 Sep 2020, 09:48
30 Sep 2020, 09:48
2
Kudos
Expert Reply
Top Contributor
mihir0710 wrote:
Chan and Mieko drove separate cars along the entire length of a certain route. If Chan made the trip in 15 minutes, how many minutes did it take Mieko to make the same trip?
(1) Mieko’s average speed for the trip was 3/4 of Chan’s average speed.
(2) The route is 14 miles long.
(1) Mieko’s average speed for the trip was 3/4 of Chan’s average speed.
(2) The route is 14 miles long.
Given: Chan and Mieko drove separate cars along the entire length of a certain route. Chan made the trip in 15 minutes.
Target question: how many minutes did it take Mieko to make the same trip?
Statement 1: Mieko’s average speed for the trip was 3/4 of Chan’s average speed.
If you aren't familiar with attari92's inverse proportion property, you can still solve the question.
Let d = the distance traveled
Let r = Chan's speed (in the miles per minute)
So, (3/4)r = Mieko's speed (in the miles per minute)
In other words, 3r/4 = Mieko's speed
time = distance/speed
So, from the given information, we can write: d/r = 15 (minutes)
This means Mieko's travel time = d/(3r/4)
= (d)(4/3r)
= 4d/3r
= (4/3)(d/r)
= (4/3)(15)
= 20
So, Mieko's travel time is 20 minutes
Since we can answer the target question with certainty, statement 1 is SUFFICIENT
Statement 2: The route is 14 miles long
Since this statement provides no information about Mieko, there's no way to calculate Mieko's travel time
Statement 2 is NOT SUFFICIENT
Answer: A
Cheers,
Brent
