GMAT Question of the Day - Daily to your Mailbox; hard ones only

 It is currently 22 Jun 2018, 11:50

### 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

# In the figures above, if the area

Author Message
Senior Manager
Joined: 05 Oct 2008
Posts: 258
In the figures above, if the area [#permalink]

### Show Tags

24 Dec 2008, 07:00
another one from gmatprep

Attachment:
qs.doc [63.5 KiB]

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
SVP
Joined: 07 Nov 2007
Posts: 1738
Location: New York

### Show Tags

24 Dec 2008, 11:43
study wrote:
another one from gmatprep

Attachment:
qs.doc

$$1/2*S*H = 2 * 1/2*s*h$$

S/s=H/h (for similar triangles)

$$S^2= 2*s^2$$
$$S=sqrt(2)*s$$

_________________

Smiling wins more friends than frowning

Senior Manager
Joined: 05 Oct 2008
Posts: 258

### Show Tags

29 Dec 2008, 09:29
can someone give a more detailed explanation.

how does suresh get s^2??
Intern
Joined: 12 Sep 2008
Posts: 23

### Show Tags

29 Dec 2008, 11:02
The ratio of the area is similarity sqared.

For example:

Triangle 1 area: 10
base: 5
height: 4

Triagnle 2 area: 40
base: 2(5)=10
height: 2(4)=8

Similiartiy between triangle 1 and 2 is 1/2 since both triangle 2's base and height are twice the triangle 1's.
10/40 = (1^2)/(2^2)
1/4 = 1/4

Now, going back to the question.

1/2 = (1/sq. rt 2)^2
Similarity between the smaller triangle and the bigger triangle is sq. rt. 2
Therefore S = sq. rt 2 * s.
Senior Manager
Joined: 05 Oct 2008
Posts: 258

### Show Tags

29 Dec 2008, 11:11

How do you get portion highlighted in red?:
10/40 = (1^2)/(2^2)

shouldnt it be 10/40 = 5/10?

and i still dont understand how you are using this information to derive sqroot2 as teh answer.

--== Message from GMAT Club Team ==--

This is not a quality discussion. It has been retired.

If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.
Re: geo-gmatprep   [#permalink] 29 Dec 2008, 11:11
Display posts from previous: Sort by

# In the figures above, if the area

Moderator: chetan2u

 Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne 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®.