It is currently 21 Oct 2017, 11:06

Close

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
Your Progress

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

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

a painter calculated the amount of paint needed to cover the

  post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
Intern
Intern
avatar
Joined: 05 Aug 2008
Posts: 14

Kudos [?]: [0], given: 0

a painter calculated the amount of paint needed to cover the [#permalink]

Show Tags

New post 19 Aug 2008, 08:22
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

a painter calculated the amount of paint needed to cover the four wall of a window less room, but mistakenly assumed that the walls were 9ft tall when they were in fact 10ft tall. his initial calcualtion indicated that he would need 18 cans of paint. If each can of paint can cover an area of 25 square feet, what is the actual number of cans needed to paint the room?

19

20

20 1/2

21

21 1/2

Kudos [?]: [0], given: 0

Senior Manager
Senior Manager
avatar
Joined: 06 Apr 2008
Posts: 429

Kudos [?]: 165 [0], given: 1

Re: area [#permalink]

Show Tags

New post 19 Aug 2008, 08:34
pattydread wrote:
a painter calculated the amount of paint needed to cover the four wall of a window less room, but mistakenly assumed that the walls were 9ft tall when they were in fact 10ft tall. his initial calcualtion indicated that he would need 18 cans of paint. If each can of paint can cover an area of 25 square feet, what is the actual number of cans needed to paint the room?

19

20

20 1/2

21

21 1/2


Initial calc = 25*18 = 450sq ft

Let x be width of one wall and y of other.

9x + 9y + 9x + 9y = 18 (x + y) = 450
x + y = 25

When height = 10

Area = 25*10*2 = 500

Therefore cans required = 20

Kudos [?]: 165 [0], given: 1

Manager
Manager
avatar
Joined: 11 Apr 2008
Posts: 202

Kudos [?]: 18 [0], given: 1

Re: area [#permalink]

Show Tags

New post 19 Aug 2008, 09:59
let x is the width of wall.
So for the 9 ft tall wall, the area is 9x and he would need 18 cans of paint
If the actual length is 10 ft then for 10x he would need 18/9x*10= 20 can of paint




-----------
a painter calculated the amount of paint needed to cover the four wall of a window less room, but mistakenly assumed that the walls were 9ft tall when they were in fact 10ft tall. his initial calcualtion indicated that he would need 18 cans of paint. If each can of paint can cover an area of 25 square feet, what is the actual number of cans needed to paint the room?
_________________

Nobody dies a virgin, life screws us all.

Kudos [?]: 18 [0], given: 1

Senior Manager
Senior Manager
User avatar
Joined: 19 Mar 2008
Posts: 351

Kudos [?]: 68 [0], given: 0

Re: area [#permalink]

Show Tags

New post 19 Aug 2008, 10:47
a painter calculated the amount of paint needed to cover the four wall of a window less room, but mistakenly assumed that the walls were 9ft tall when they were in fact 10ft tall. his initial calcualtion indicated that he would need 18 cans of paint. If each can of paint can cover an area of 25 square feet, what is the actual number of cans needed to paint the room?

Assme the perimeter of the room is x
y is the actual required no. of can

9x=18*25
x = 50 sq feet

actual total area = 50*10 = 500
y = 500/25 = 20

Kudos [?]: 68 [0], given: 0

Re: area   [#permalink] 19 Aug 2008, 10:47
Display posts from previous: Sort by

a painter calculated the amount of paint needed to cover the

  post reply Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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®.