Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 09 Mar 2014, 23:24

### 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

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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# On level farmland, two runners leave at the same time from

Author Message
TAGS:
CEO
Joined: 21 Jan 2007
Posts: 2774
Location: New York City
Followers: 6

Kudos [?]: 169 [0], given: 4

On level farmland, two runners leave at the same time from [#permalink]  02 Jun 2007, 16:59
00:00

Difficulty:

5% (low)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions
9. On level farmland, two runners leave at the same time from the intersection of two country roads. One runner jogs due north at a constant rate of 8 miles per hour while the second runner jogs due east at a constant rate that is 4 miles per hour faster than the first runner's rate. How far apart, to the nearest mile, will they be after 1/2 hour ?
(A) 6
(B) 7
(C) 8
(D) 12
(E) 14
CEO
Joined: 17 May 2007
Posts: 2995
Followers: 51

Kudos [?]: 406 [0], given: 210

If runner 1 is going north and runner 2 is going east they are like two sides of a 90 degree triangle.

Side 1 = 8 m/h --> 4 m in 1/2 hr
Side 2 = 12 m/h --> 6 m in 1/2 hr

to complete this right angle triangle
d^2 = 4^2 + 6^2
d^2 = 52
= 2 sqrt(13) ~ 7

Director
Joined: 25 Oct 2006
Posts: 653
Followers: 7

Kudos [?]: 148 [0], given: 6

Let ABC is a right angle triangle, and angle ABC is 90 degree, So, first one is going through AB and achieved 4miles whereas the person on BC achieves 6 miles in half an hour,

Now sqrt(4^2 + 6^2) = nearest distance ~ 7 B.
Similar topics Replies Last post
Similar
Topics:
A boat M leaves Shore A and at the same time boat B leaves 6 30 Jun 2006, 08:34
Two flights leave Chicago for Tashkent at the same time. 2 10 Aug 2006, 13:05
Two flights leave Chicago for Tashkent at the same time. 1 02 Nov 2008, 00:31
On level farmland, two runners leave at the same time from 3 29 Apr 2010, 04:07
Display posts from previous: Sort by