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

we will pick new questions that match your level based on your Timer History

Track Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

It appears that you are browsing the GMAT Club forum unregistered!

Signing up is free, quick, and confidential.
Join other 500,000 members and get the full benefits of GMAT Club

Registration gives you:

Tests

Take 11 tests and quizzes from GMAT Club and leading GMAT prep companies such as Manhattan GMAT,
Knewton, and others. All are free for GMAT Club members.

Applicant Stats

View detailed applicant stats such as GPA, GMAT score, work experience, location, application
status, and more

Books/Downloads

Download thousands of study notes,
question collections, GMAT Club’s
Grammar and Math books.
All are free!

Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:

If you jog half way from A to B at a steady rate of 2miles [#permalink]

Show Tags

24 Feb 2005, 18:44

This topic is locked. If you want to discuss this question please re-post it in the respective forum.

If you jog half way from A to B at a steady rate of 2miles per hour, how fast would you have to run the rest of the way in order to average 4 miles per hour for the entire trip?

Well speed can not be zero then you won't get a net overall speed of 4 mph. Only way that is possible is if speed is infinite (hence can't be determined)

Answer is 8 miles per hour.
If you go 2 miles per hour halfway through, that means you only ran one mile. Half of 2 is 1.
Ok, you need to catch up and get 4 miles per hour.
You have only 30 minutes to get this done. And you got one mile to get the job done.
The entire trip is 2 miles, it would take 30 minutes if you ran 4 miles per hour.

Very simple, turn that 30 minutes into 15 minutes and voila, 8 miles per hour.
2 miles per hour will get you through the first mile in 30 minutes, going at 8 miles per hour will finish off that last mile in 15 minutes. Entire time would take you 45 minutes to accomplish this run.

This is a no brainer, to me, it's straightforward because I'm a daily runner.

The entire trip is 2 miles, it would take 30 minutes if you ran 4 miles per hour.

Exactly. It would take you 30 minutes for the 2 miles if your average speed is 4 miles per hour. Now look, you are half way of the 2 mile, and how much time have you already used up? 30 minutes! You have no time left for the rest of the trip. You need a miracle to reach the other end instantly, or a infinite speed.

The entire trip is 2 miles, it would take 30 minutes if you ran 4 miles per hour.

Exactly. It would take you 30 minutes for the 2 miles if your average speed is 4 miles per hour. Now look, you are half way of the 2 mile, and how much time have you already used up? 30 minutes! You have no time left for the rest of the trip. You need a miracle to reach the other end instantly, or a infinite speed.

Hey buddy, there's definitely a typo with what the author placed on his message. Don't read it word for word. Read the idea.