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.
Apr 2512:30 AM EDT
-01:30 AM EDT
At one point, she believed GMAT wasn’t for her. After scoring 595, self-doubt crept in and she questioned her potential. But instead of quitting, she made the right strategic changes. The result? A remarkable comeback to 695. Check out how Saakshi did it.
Apr 2601:30 AM EDT
-02:30 AM EDT
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.
Apr 2610:00 AM EDT
-11:00 AM EDT
The Target Test Prep course represents a quantum leap forward in GMAT preparation, a radical reinterpretation of the way that students should study. Try before you buy with a 5-day, full-access trial of the course for FREE!
Apr 2711:00 AM EDT
-12:00 PM EDT
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
Apr 2808:00 AM PDT
-11:00 AM PDT
Whether you are just beginning your MBA journey or fine-tuning your path to a 700+ score, GMAT Day is designed to give you a competitive edge.
May 0111:00 AM PDT
-12:00 PM PDT
Free- full-length test + 15 concept videos + 150+ short videos + study plan!
27 Apr 2017, 02:27
Kudos
Bookmarks
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
82% (02:30) correct
18%
(02:34)
wrong
based on 250
sessions
History
Date
Time
Result
Not Attempted Yet
A certain road trip was completed in two parts interrupted by an hour-long lunch break. During the first portion of the trip the average speed was 55 miles per hour and the average speed during the second part of the trip was 63 miles per hour. If the trip was 480 miles long and took a total of 8 hours (excluding the time stopped for lunch) then which of the following is the amount of time spent driving before the lunch break?
A. 2
B. 3
C. 4
D. 5
E. 6
A. 2
B. 3
C. 4
D. 5
E. 6
27 Apr 2017, 02:38
Kudos
Bookmarks
Let the time traveled AFTER lunch be x
Hence, the time traveled BEFORE lunch is 8-x
Given the speed before lunch is 55 miles/hr and post lunch is 63 miles/hr
55(8-x) + 63x = 480
440 - 55x + 63x = 480
440 + 8x = 480
8x = 480-440 = 40
Solving for x, x = 5
Hence the time traveled before the lunch break is 3(Option B)
Hence, the time traveled BEFORE lunch is 8-x
Given the speed before lunch is 55 miles/hr and post lunch is 63 miles/hr
55(8-x) + 63x = 480
440 - 55x + 63x = 480
440 + 8x = 480
8x = 480-440 = 40
Solving for x, x = 5
Hence the time traveled before the lunch break is 3(Option B)
General Discussion
27 Jul 2017, 09:32
Kudos
Bookmarks
Total average speed = 480 / 8 hours = 60 MPH
We are looking at a weighted average (by time) speed of 55 (first part of the trip) and 63 (second part of the trip)
60 falls between these 2 speeds closer to 63. Overall relationship of time is, thus, 5x to 3x
Thus, 5x + 3x = 8x and 8x = total time (8 hours) => x = 1
From our relathionship above we know that 3x corresponds to time before the lunch (we have to take less of that time - 3x and more of time after lunch - 5x to arrive to 63 mph)
Thus, time before lunch = 3. B is the answer.
We are looking at a weighted average (by time) speed of 55 (first part of the trip) and 63 (second part of the trip)
60 falls between these 2 speeds closer to 63. Overall relationship of time is, thus, 5x to 3x
Thus, 5x + 3x = 8x and 8x = total time (8 hours) => x = 1
From our relathionship above we know that 3x corresponds to time before the lunch (we have to take less of that time - 3x and more of time after lunch - 5x to arrive to 63 mph)
Thus, time before lunch = 3. B is the answer.
Attachments
q road trip.png [ 6.5 KiB | Viewed 3750 times ]
