BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Co-ordinate Geometry (Source: Kaptests)

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Senior | Next Rank: 100 Posts
Posts: 99
Joined: Thu Jun 09, 2011 2:09 pm
Thanked: 11 times

by kanwar86 » Mon Nov 21, 2011 11:33 am
abhishek karumuri wrote:The distance from the x -axis to point P is half the distance from the y -axis to point P . If the coordinates of P are ( x , - 7), how many units is P from the y -axis?

A)3.5
B)7
C)9.8
D)10.5
E)14

OA: E

Plz help
IMO answer is E)
Approach - The distance from the x -axis to point P...ordinate of P
the distance from the y -axis to point P...abscissa of P
co-ordinates of P are (2a, a)
Equate (2a,a) with ( x , - 7)
Regards

Kanwar

"In case my post helped, do care to thank. Happy learning :)"
Top
Legendary Member
Posts: 1084
Joined: Fri Apr 15, 2011 2:33 pm
Thanked: 158 times
Followed by:21 members

by pemdas » Tue Nov 22, 2011 2:42 am
we have a function concept applied with a coordinate geometry topic
y=(1/2)*x, the coordinates of P is (x,-7) and according to our function we may have -7=(1/2)*x OR x=-14. Now the question asks "how many units is P from the y-axis" note please the word 'unit' and we are not looking for coordinate which is -14, but looking for 'how many units'. The answer is 14 units, E.
Attachments
btg-00n.JPG
Success doesn't come overnight!
Top
Post new topic Post Reply
• Page 1 of 1