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 2308:00 PM PDT
-09:00 PM PDT
Video explanations + diagnosis of 10 weakest areas + 150+ short videos + study plan!
Apr 2301:30 AM EDT
-02:30 AM EDT
Struggling with GMAT Verbal as a non-native speaker? Harsh improved his score from 595 to 695 in just 45 days—and scored a 99 %ile in Verbal (V88)! Learn how smart strategy, clarity, and guided prep helped him gain 100 points.
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 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.
15 Jul 2015, 19:10
Kudos
Bookmarks
B
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:
89% (01:48) correct
11%
(02:43)
wrong
based on 85
sessions
History
Date
Time
Result
Not Attempted Yet
In a 40-mile trip, the first 20 miles were traveled in 50mph. If the total trip average speed is 60mph, what should be the average speed in the last 20 miles?
A) 150
B) 75
C) 50
D) 45
E) 40
This question dos not apear to be difficult, but it took me too much time to solve. Does anyone has a fast way of killing it?
A) 150
B) 75
C) 50
D) 45
E) 40
This question dos not apear to be difficult, but it took me too much time to solve. Does anyone has a fast way of killing it?
This Question is Locked Due to Poor Quality
Hi there,
The question you've reached has been archived due to not meeting our community quality standards. No more replies are possible here.
Looking for better-quality questions? Check out the 'Similar Questions' block below
for a list of similar but high-quality questions.
Want to join other relevant Problem Solving discussions? Visit our Problem Solving (PS) Forum
for the most recent and top-quality discussions.
Thank you for understanding, and happy exploring!
ENGRTOMBA2018
Joined: 20 Mar 2014
Last visit: 01 Dec 2021
Posts: 2,319
Given Kudos: 816
Concentration: Finance, Strategy
Schools: Kellogg '18 (M)
GMAT 1: 750 Q49 V44
GPA: 3.7
WE:Engineering (Aerospace and Defense)
Products:
15 Jul 2015, 19:18
Kudos
Bookmarks
Mascarfi
Do not change the wording of the question. The same question has been discussed at the location : a-driver-completed-the-first-20-miles-of-a-40-miles-trip-at-130648.html?fl=similar . Please search the forums before you post a new question.
As far as your question is concerned, the simplest way is to observe that the distance of 20 miles is half of 40 miles. Thus treating this as a simple average problem , we can see that for 2 things to have an average of 60 with 1 being 50, the other needs to be just more than 60 to bring the average up to 60. Thus B is the only logical answer. Option A will give you a comparatively higher average value while rest of the options will decrease the average.
The above method was applicable only because the speeds given were exactly at mid way of the total distance. Had it been at any other point (2/3rds of the total distance etc) then we would have to apply the average speed formula.
15 Jul 2015, 20:33
Kudos
Bookmarks
Mascarfi
METHOD-1
Time = Distance / Speed
Time to travel First 20 miles = 20/50 = 2/5 hours
Total Time to cover 40 miles = 40/60 = 2/3 hours
i.e. Time to cover last 20 miles = (2/3)-(2/5) = 4/15 hours
Speed = Distance / Time
Speed while covering last 20 miles = 20/(4/15) = 75
METHOD-2
Average speed for equal to and fro motion = 2ab / (a+b) where a and b are speeds in to and fro cases
60 = 2*50*b/(50+b)
i.e. b = 75
Answer: Option B
This Question is Locked Due to Poor Quality
Hi there,
The question you've reached has been archived due to not meeting our community quality standards. No more replies are possible here.
Looking for better-quality questions? Check out the 'Similar Questions' block below
for a list of similar but high-quality questions.
Want to join other relevant Problem Solving discussions? Visit our Problem Solving (PS) Forum
for the most recent and top-quality discussions.
Thank you for understanding, and happy exploring!
