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

 It is currently 24 Jun 2018, 17:37

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

A machine begins pouring corn into an open silo at a

Author Message
Manager
Joined: 30 Jul 2007
Posts: 130
A machine begins pouring corn into an open silo at a [#permalink]

Show Tags

25 Aug 2008, 07:04
00:00

Difficulty:

(N/A)

Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

HideShow timer Statistics

A machine begins pouring corn into an open silo at a constant rate of 3 cubic meters per minute. At the same time, a painter begins painting the outside wall of the silo. If the silo has the shape of a right circular cylinder with an inner wall radius of 5 meters and an outer wall radius of 6 meters, will the silo be filled to capacity with corn before the surface of the outside wall is completely painted?

(1) The painter paints at a constant rate of 1 square meter per minute.

(2) The height of the silo is 18 meters.

--== 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

25 Aug 2008, 07:27
sarzan wrote:
A machine begins pouring corn into an open silo at a constant rate of 3 cubic meters per minute. At the same time, a painter begins painting the outside wall of the silo. If the silo has the shape of a right circular cylinder with an inner wall radius of 5 meters and an outer wall radius of 6 meters, will the silo be filled to capacity with corn before the surface of the outside wall is completely painted?

(1) The painter paints at a constant rate of 1 square meter per minute.

(2) The height of the silo is 18 meters.

hs = height corn filled in a minute

w*l*hs =3 --> hs = 3/(5*6) = 1/10

(1) The painter paints at a constant rate of 1 square meter per minute.

hp = height painter paints in a minute

2(w*hp+l*hp) = 1
--> ( 2(5*hp+6*hp)=1
hp= 1/22

will the silo be filled to capacity with corn before the surface of the outside wall is completely painted?
Yes .. hs > hp

Sufficient

(2) The height of the silo is 18 meters
Insuffcient.. We don't the rate at which painting..

A
What is OA.

--== 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.

_________________

Smiling wins more friends than frowning

Re: DS - corn   [#permalink] 25 Aug 2008, 07:27
Display posts from previous: Sort by