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 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.
06 Dec 2005, 13:29
Kudos
Bookmarks
A motorist travels from City X to City Y in 2 hours at an average speed of 30 km per hour and returns by the same route at an avg speed of 90 km per hour. What is the average sped for the round trip in km per hour?
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
06 Dec 2005, 13:36
Kudos
Bookmarks
This is my working (although I got the wrong answer)
30km * 2 hours = 60km one way. Therefore the routrip is 60*2 = 120km.
The return speed is 90km per hour. So, it took the motorist 2/3 of an hour to get back ie 40 minutes.
To get the average speed for the whole trip, I add up the toal distance and divide it by the total time to get the average rate right?
Total D = 120
Total Time = 2+2/3 = 8/3
Am I doing something wrong here?
30km * 2 hours = 60km one way. Therefore the routrip is 60*2 = 120km.
The return speed is 90km per hour. So, it took the motorist 2/3 of an hour to get back ie 40 minutes.
To get the average speed for the whole trip, I add up the toal distance and divide it by the total time to get the average rate right?
Total D = 120
Total Time = 2+2/3 = 8/3
Am I doing something wrong here?
