Find all School-related info fast with the new School-Specific MBA Forum
Learn more about the recent changes... close

It is currently 21 May 2013, 02:38
Customize  |  Hide

Search
Register
New posts
Unanswered

A driver traveled 1 mile at t ms/ hour. If the speed is

  Question banks Downloads My Bookmarks Reviews  
  Oldest Best Reply
Search for:
 
Print view
First unread post
Author Message
TAGS:
Senior Manager
Senior Manager
Joined: 08 Aug 2005
Posts: 261
Followers: 1

Kudos [?]: 0 [0], given: 0

GMAT Tests User
A driver traveled 1 mile at t ms/ hour. If the speed is [#permalink] New post 05 May 2006, 23:13
A driver traveled 1 mile at t ms/ hour. If the speed is t+20ms/hour, it will take 4 minutes less. What ¡s the value of t?
VP
VP
User avatar
Joined: 29 Dec 2005
Posts: 1356
Followers: 6

Kudos [?]: 17 [0], given: 0

GMAT Tests User
Re: value of t? [#permalink] New post 25 May 2006, 19:03
getzgetzu wrote:
A driver traveled 1 mile at t ms/ hour. If the speed is t+20ms/hour, it will take 4 minutes less. What ¡s the value of t?


good one but little unclear............

t = 10 miles.
VP
VP
User avatar
Joined: 07 Nov 2005
Posts: 1134
Location: India
Followers: 2

Kudos [?]: 22 [0], given: 1

GMAT Tests User
 [#permalink] New post 25 May 2006, 20:23
Yes got t=10 miles as well.

(1/t)-(1/(t+20))=4/60...

=> t^2+20t-300=0

=> t=10
SVP
SVP
User avatar
Joined: 30 Mar 2006
Posts: 1744
Followers: 1

Kudos [?]: 12 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 May 2006, 02:05
T=10

1/t -4/60 = 1/t+20

=> 20/t(t+20) = 1/15
=> t^2 +20t -300 = 0

Solving the equation T= -30 or 10
hence speed is 10
Director
Director
User avatar
Joined: 10 Oct 2005
Posts: 533
Location: US
Followers: 1

Kudos [?]: 4 [0], given: 0

GMAT Tests User
 [#permalink] New post 26 May 2006, 02:24
Yes answer is 10.

Such problems require you find an equitable equition for time or distance.
In this case it is time which can compared using common variable t.
  [#permalink] 26 May 2006, 02:24
    Similar topics Author Replies Last post
Similar
Topics:
 New posts A driver traveled 1 mile at t miles/hour. If the speed is getzgetzu 2 22 Jul 2006, 06:26
New posts If a car travels with a speed of 40 miles per hour for first Summer3 3 14 Mar 2007, 03:05
Popular new posts It takes the high-speed train x hours to travel the z miles gmatnub 12 25 Jun 2008, 22:56
New posts It takes the high-speed train x hours to travel the z miles pm4553 5 04 Oct 2008, 07:08
New posts 3 EXPERTS_POSTS_IN_THIS_TOPIC A cyclist travels 20 miles at a speed of 15 miles per hour. farukqmul 4 08 Jul 2012, 01:58
Display posts from previous: Sort by

A driver traveled 1 mile at t ms/ hour. If the speed is

  Question banks Downloads My Bookmarks Reviews  
Print view
First unread post

Moderators: Bunuel, VeritasPrepKarishma

Search for:


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.

Main navigation

GMAT Resources

Partners

MBA Resources

www.gmac.com|www.mba.com