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 1912:30 PM EST
-01:30 PM EST
Learn how Keshav, a Chartered Accountant, scored an impressive 705 on GMAT in just 30 days with GMATWhiz's expert guidance. In this video, he shares preparation tips and strategies that worked for him, including the mock, time management, and more
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 2001:30 PM EST
-02:30 PM IST
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.
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 2407:00 PM PST
-08:00 PM PST
Full-length FE mock with insightful analytics, weakness diagnosis, and video explanations!
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.
21 Feb 2011, 06:56
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
75% (00:32) correct
25%
(00:36)
wrong
based on 1288
sessions
History
Date
Time
Result
Not Attempted Yet
While driving on the expressway, did Robin ever exceed the 55-miles-per-hour speed limit?
(1) Robin drove 100 miles on the expressway.
(2) Robin drove for 2 hours on the expressway.
(1) Robin drove 100 miles on the expressway.
(2) Robin drove for 2 hours on the expressway.
1) to calculate speed to cover 100 miles time is required ----NS
2) in 2 hours how many miles Robin covered we don't know.---NS
combining 1&2 options
speed = 100/2=50 answer is no he didn't exceed speed
c
Which is wrong
2) in 2 hours how many miles Robin covered we don't know.---NS
combining 1&2 options
speed = 100/2=50 answer is no he didn't exceed speed
c
Which is wrong
21 Feb 2011, 07:02
Kudos
Bookmarks
100/2=50 m/h is his average speed.
What if he drove @ 60m/h in first hour and 40 miles/h in the second;
Total distance: 100miles
time: 2 hours
But he sped up to 60m/h > 55m/h
What if he drove @ constant rate of 50m/h in first hour and constant rate of 50 miles/h in the second;
Total distance: 100miles
time: 2 hours
But he didn't speed beyond 55m/h
Ans: "E"
What if he drove @ 60m/h in first hour and 40 miles/h in the second;
Total distance: 100miles
time: 2 hours
But he sped up to 60m/h > 55m/h
What if he drove @ constant rate of 50m/h in first hour and constant rate of 50 miles/h in the second;
Total distance: 100miles
time: 2 hours
But he didn't speed beyond 55m/h
Ans: "E"
21 Feb 2011, 07:04
Kudos
Bookmarks
That's because when you divide the distance by time, you get the average speed...
However, the question is, did Robin exceed the 55 mph speed limit?
So the average speed has no significance here
We require the peak speed!
So using statement 1 and 2:
Robin drove for 2 hours and covered a distance of 100 miles:
Case 1
If Robin drove at 60 mph for the first hour, distance = 60 miles
If Robin drove at 40 mph for the next hour, distance = 40 miles
Total Distance = 100
Total time = 2 hrs
Did she exceed the speed limit? YES!
Case 2:
If Robin drove at 50 mph for 2 hours, distance = 100 miles
Total Distance = 100
Total Time = 2 hrs
Did she Exceed the speed limit? NO!
Thus, insufficient!
However, the question is, did Robin exceed the 55 mph speed limit?
So the average speed has no significance here
We require the peak speed! So using statement 1 and 2:
Robin drove for 2 hours and covered a distance of 100 miles:
Case 1
If Robin drove at 60 mph for the first hour, distance = 60 miles
If Robin drove at 40 mph for the next hour, distance = 40 miles
Total Distance = 100
Total time = 2 hrs
Did she exceed the speed limit? YES!
Case 2:
If Robin drove at 50 mph for 2 hours, distance = 100 miles
Total Distance = 100
Total Time = 2 hrs
Did she Exceed the speed limit? NO!
Thus, insufficient!
