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

Redeem

PS - Word translation - I assume this is time consuming

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
User avatar
Legendary Member
Posts: 1665
Joined: Thu Nov 03, 2011 7:04 pm
Thanked: 165 times
Followed by:70 members

PS - Word translation - I assume this is time consuming

by karthikpandian19 » Mon Jun 18, 2012 5:42 am
If a rectangular swimming pool has a length of k feet, a perimeter of p feet, and an area of a square feet, which of the following must be true?


(A) k^2 - kp = 0

(B) k^2 + 2ap = 0

(C) 2(k^2) + ak + p^2 = 0

(D) 2(k^2) - p^2 = 0

(E) 2(k^2) - kp + 2a = 0


Is there any short way of solving this q?
this is really time consuming for me
Regards,
Karthik
The source of the questions that i post from JUNE 2013 is from KNEWTON

---If you find my post useful, click "Thank" :) :)---
---Never stop until cracking GMAT---
Top
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 1665
Joined: Thu Nov 03, 2011 7:04 pm
Thanked: 165 times
Followed by:70 members

by karthikpandian19 » Mon Jun 18, 2012 5:46 am
Actually just after posting the question, i realized that this one can be easily solved by PLUGGING IN NOS. concept

Anyway , the OA will be revealed after couple of threads
Regards,
Karthik
The source of the questions that i post from JUNE 2013 is from KNEWTON

---If you find my post useful, click "Thank" :) :)---
---Never stop until cracking GMAT---
Top
User avatar
Legendary Member
Posts: 520
Joined: Sat Apr 28, 2012 9:12 pm
Thanked: 339 times
Followed by:49 members
GMAT Score:770

by eagleeye » Mon Jun 18, 2012 6:50 am
This is how you could do it with algebra.

We are told that one side is k, let the other side be m.
Then we have perimeter p = 2(k+m) => m=p/2-k
Also area a = mk => m=a/k.

Equating the m in two equations:
p/2-k = a/k => pk -2k^2 =2a => 2k^2-kp+2a = 0.

Hence E
Top
User avatar
Legendary Member
Posts: 1665
Joined: Thu Nov 03, 2011 7:04 pm
Thanked: 165 times
Followed by:70 members

by karthikpandian19 » Mon Jun 18, 2012 6:36 pm
Thank you eagleeye

I struggled with the Algebra, as i didnt equate, as you did over here.

Anyway now the way of algebra is far more easier than Plugging here.


OA is E
eagleeye wrote:This is how you could do it with algebra.

We are told that one side is k, let the other side be m.
Then we have perimeter p = 2(k+m) => m=p/2-k
Also area a = mk => m=a/k.

Equating the m in two equations:
p/2-k = a/k => pk -2k^2 =2a => 2k^2-kp+2a = 0.

Hence E
Regards,
Karthik
The source of the questions that i post from JUNE 2013 is from KNEWTON

---If you find my post useful, click "Thank" :) :)---
---Never stop until cracking GMAT---
Top
Post new topic Post Reply
• Page 1 of 1