GMAT Changed on April 16th - Read about the latest changes here

 It is currently 23 May 2018, 11:19

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

If the height of a triangle is decreased by 40% and its base is

Author Message
Manager
Joined: 07 Jun 2017
Posts: 173
Location: India
Concentration: Technology, General Management
GMAT 1: 660 Q46 V38
GPA: 3.6
WE: Information Technology (Computer Software)
If the height of a triangle is decreased by 40% and its base is [#permalink]

Show Tags

24 Sep 2017, 23:10
00:00

Difficulty:

35% (medium)

Question Stats:

78% (00:32) correct 22% (01:02) wrong based on 18 sessions

HideShow timer Statistics

If the height of a triangle is decreased by 40% and i its base is increased by 40%, what will be effect on its area?

A. No change
B. 8% decrease
C. 8% increase
D. 16% decrease
E. 16% increase

--== 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.

_________________

Regards,
Naveen
email: nkmungila@gmail.com
Please press kudos if you like this post

Manager
Joined: 12 Jun 2016
Posts: 221
Location: India
WE: Sales (Telecommunications)
If the height of a triangle is decreased by 40% and its base is [#permalink]

Show Tags

25 Sep 2017, 04:25
I solved this by successive Percentage change formula.

Formula Used

If a certain number changes successively by A% and B%, the effective percentage change = $$A + B + \frac{AB}{100}$$

In this case, Effective percentage change = $$40 - 40 + \frac{(40*-40)}{100}$$

= -16 %

Hence the Area of the new triangle decreases by 16%.

--== 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.

_________________

My Best is yet to come!

If the height of a triangle is decreased by 40% and its base is   [#permalink] 25 Sep 2017, 04:25
Display posts from previous: Sort by