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

Redeem

Plz help

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Newbie | Next Rank: 10 Posts
Posts: 9
Joined: Sat Apr 26, 2008 7:42 am

by krazzy4 » Sat Dec 20, 2008 7:26 am
This is the 2nd one...
Attachments
20th Dec PS2.JPG
Top
Legendary Member
Posts: 574
Joined: Sun Jun 01, 2008 8:48 am
Location: Bangalore
Thanked: 28 times

by vishubn » Sat Dec 20, 2008 8:34 am
2)

Quickly draw out a small grid on paper and plot the point (4,7). The question states that no point on the circle is non-negative. So, the radius cannot extend from the center and pass through either the x-axis or the y-axis.

The center is located 4 units from the y-axis and 7 units from the x-axis. If the radius is 7, then it will extend out beyond the y-axis and give a negative value. If the radius is 4, then it will extend out to the y-axis, but will not cross it. With the radius of 4 it still has 3 units until it hits the x-axis so it is fine.

so, the maximum radius will yield the maximum area...Pi*4^2 = 16Pi
KILL !! DIE !! or BEAT my FEAR !!! de@D END!!
Top
Legendary Member
Posts: 574
Joined: Sun Jun 01, 2008 8:48 am
Location: Bangalore
Thanked: 28 times

by vishubn » Sat Dec 20, 2008 8:45 am
simplicity sake i removed zeros

19,21,36,45,68... is the sales acheived by all...so after correction

so 19 must have increased to new number

and ann must have decreased....
ann got reduced from 450,000 to 330,000 ( this is the onyl way... median can be repalced with 330,000)

so the diff is 120,000 was cal's sale.... so now the sales in the order

210,000,310,000,330,000,360,0000,680,0000

Corrected sale is 120,000

OA D

vishu
KILL !! DIE !! or BEAT my FEAR !!! de@D END!!
Top
Post new topic Post Reply
• Page 1 of 1