GMAT Question of the Day - Daily to your Mailbox; hard ones only

It is currently 20 Nov 2019, 02:51

Close

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

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.

Close

Request Expert Reply

Confirm Cancel

Cyclist Speed Varies, maximum distance travel in 7 hours?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Intern
Intern
avatar
Joined: 09 May 2011
Posts: 15
Cyclist Speed Varies, maximum distance travel in 7 hours?  [#permalink]

Show Tags

New post 11 Mar 2012, 15:14
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

89% (00:39) correct 11% (00:54) wrong based on 120 sessions

HideShow timer Statistics

Source: Knewton
A cyclist's speed varies, depending on the terrain, between 6.0 miles per hour and 14.0 miles per hour, inclusive. What is the maximum distance, in miles, that the cyclist could travel in 7 hours?

(A) 42
(B) 56
(C) 70
(D) 98
(E) 140

Here is my question, when a problem states that "speed varies," doesn't that mean that the biker did not have a constant speed at the upper end of the range? This is just a semantic complaint with the question but one that caused me to choose the wrong answer.

The take-away that I have is that you must assume the most ideal situation in all ways in order to calculate the maximum. In this case, that means disregarding the adverbial clause "depending on the terrain" and that "speed varies" to assume the upper limit of the speed capability. Is it standard to have to assume that the speed does not in fact vary?
Intern
Intern
avatar
Joined: 07 Aug 2011
Posts: 49
Concentration: Entrepreneurship, Finance
GPA: 3.87
Re: Cyclist Speed Varies, maximum distance travel in 7 hours?  [#permalink]

Show Tags

New post 11 Mar 2012, 15:33
I see what you mean and it hitched me up, too. I would think that since the problem suggests the the speed would vary with terrain - 14 mph traveling the optimal terrain, 6 mph traveling the least favorable terrain - then if the rider only covered optimal terrain then it would have resulted in an average of 14 mph for the entire seven hours.
Math Expert
User avatar
V
Joined: 02 Sep 2009
Posts: 59180
Re: Cyclist Speed Varies, maximum distance travel in 7 hours?  [#permalink]

Show Tags

New post 12 Mar 2012, 00:16
gdh wrote:
Source: Knewton
A cyclist's speed varies, depending on the terrain, between 6.0 miles per hour and 14.0 miles per hour, inclusive. What is the maximum distance, in miles, that the cyclist could travel in 7 hours?

(A) 42
(B) 56
(C) 70
(D) 98
(E) 140

Here is my question, when a problem states that "speed varies," doesn't that mean that the biker did not have a constant speed at the upper end of the range? This is just a semantic complaint with the question but one that caused me to choose the wrong answer.

The take-away that I have is that you must assume the most ideal situation in all ways in order to calculate the maximum. In this case, that means disregarding the adverbial clause "depending on the terrain" and that "speed varies" to assume the upper limit of the speed capability. Is it standard to have to assume that the speed does not in fact vary?


While I agree that it's quite an odd way to make a simple question to look harder then it actually is, there is nothing mathematically wrong in it.

We are told that: generally a cyclist's speed varies, depending on the terrain, between 6.0 miles per hour and 14.0 miles per hour, inclusive. Is it possible the cyclist to travel with maximum speed for some time? Why not, if there is right terrain for that. So, if there is long enough terrain for the maximum speed of 14 mph then the maximum distance, in miles, that the cyclist could travel in 7 hours would be 7*14=98 miles.

Answer: D.

Hope it helps.
_________________
GMAT Club Bot
Re: Cyclist Speed Varies, maximum distance travel in 7 hours?   [#permalink] 12 Mar 2012, 00:16
Display posts from previous: Sort by

Cyclist Speed Varies, maximum distance travel in 7 hours?

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  





Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne