GRE Prep 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.
A certain road trip was completed in two parts interrupted by an hour-
[#permalink]
28 Apr 2021, 08:35
28 Apr 2021, 08:35
Expert Reply
1
Bookmarks
00:00
Question Stats:
90% (02:08) correct
10% (02:09) wrong based on 10 sessions
Hide Show timer Statistics
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
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A) 2
B) 3
C) 4
D) 5
E) 6
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Retired Moderator
Joined: 10 Apr 2015
Posts: 6218
Given Kudos: 136
Re: A certain road trip was completed in two parts interrupted by an hour-
[#permalink]
28 Apr 2021, 08:49
28 Apr 2021, 08:49
1
Carcass wrote:
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
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
A) 2
B) 3
C) 4
D) 5
E) 6
Kudos for the right answer and explanation
Question part of the project GRE Quantitative Reasoning Daily Challenge - (2021) EDITION
GRE - Math Book
Let's start with a word equation
(distance traveled during FIRST part of trip) + (distance traveled during SECOND part of trip) = 480 miles
Let t = time spend on FIRST part of trip (in hours)
So, 8-t = time spend on SECOND part of trip (since the ENTIRE driving time was 8 hour)
Distance = (speed)(time)
So, we can write: (55)(t ) + (63)(8 - t) = 480
Expand: 55t + (504 - 63t) = 480
Simplify: -8t + 504 = 480
Subtract 504 from both sides: -8t = -24
Solve: t = 3
Answer: B
gmatclubot
Re: A certain road trip was completed in two parts interrupted by an hour- [#permalink]
28 Apr 2021, 08:49
Moderators:
