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Circular Tub

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by money9111 » Wed Feb 03, 2010 10:59 pm
A circular tub has a band painted around its circumference. *width of band = x* What is the surface area of this painted band?

(1) x= 0.5
(2) The height of the tub is 1 meter

Data sufficiency answer choices

OA E
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by thephoenix » Wed Feb 03, 2010 11:13 pm
money9111 wrote:A circular tub has a band painted around its circumference. *width of band = x* What is the surface area of this painted band?

(1) x= 0.5....we need to know radius...insuff
(2) The height of the tub is 1 meter......we need to know inner and outer radius for surface area and not the ht....insuff

hence E
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by papgust » Wed Feb 03, 2010 11:21 pm
Moved to "Data Sufficiency" section!

Please post the questions in the right folder. Thanks!
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by sanju09 » Thu Feb 04, 2010 12:26 am
papgust wrote:Moved to "Data Sufficiency" section!

Please post the questions in the right folder. Thanks!
what :?:
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by money9111 » Thu Feb 04, 2010 8:23 am
what's the formula for a Volume of a cylinder?
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by Mom4MBA » Thu Feb 04, 2010 11:37 am
Volume of cylinder = πr²h

the answer of this question is E as the radius is not known.
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by money9111 » Thu Feb 04, 2010 11:42 am
how did you make that pi sign?
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by Mom4MBA » Thu Feb 04, 2010 11:48 am
:) follow this link:
https://www.tedmontgomery.com/tutorial/altchrc.html
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by money9111 » Thu Feb 04, 2010 11:59 am
ah thank you!
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by sanju09 » Thu Feb 04, 2010 10:19 pm
thanks for giving such a useful link, Mom4MBA B-)
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by harsh.champ » Fri Feb 05, 2010 2:30 am
sanju09 wrote:
thanks for giving such a useful link, Mom4MBA B-)
Thanks,Mom4MBA.Really appreciate it.

As for solving the question,the surface area formula is (2Ï€r)x(x) [Circumference x Width of the band]

If the test-taker is in haste he can mistake that both the variables r and x are provided in the question.
On first glance ,it seemed to be that 2 statements are given ,
hence the surface area would be 2xπx0.5x1.
After looking for the 2nd time carefully,I was able to point out that there was no use of the "height of the tub".
Hence,answer would be E.
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by harsh.champ » Fri Feb 05, 2010 2:37 am
sanju09 wrote:
papgust wrote:Moved to "Data Sufficiency" section!

Please post the questions in the right folder. Thanks!
what :?:
It means that initially maybe the problem was posted in the PROBLEM SOLVING or the GMAT Verbal forum.
Papgust perhaps saw it and being a moderator moved the question to the DATA SUFFICIENCY folder.
This way,if I want to specifically practice PS question and supposedly I ran into this question ,I would have ended up wasting my time.It is beneficial this way that questions are moved to the appropriate destination folder.

I think that was what Papgust was trying to imply.
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by sanju09 » Fri Feb 05, 2010 2:46 am
harsh.champ wrote:
sanju09 wrote:
papgust wrote:Moved to "Data Sufficiency" section!

Please post the questions in the right folder. Thanks!
what :?:
It means that initially maybe the problem was posted in the PROBLEM SOLVING or the GMAT Verbal forum.
Papgust perhaps saw it and being a moderator moved the question to the DATA SUFFICIENCY folder.
This way,if I want to specifically practice PS question and supposedly I ran into this question ,I would have ended up wasting my time.It is beneficial this way that questions are moved to the appropriate destination folder.

I think that was what Papgust was trying to imply.
OIC thnx
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by Mom4MBA » Fri Feb 05, 2010 5:38 am
Hi harsh.camp :)
thanks for pointing out my mistake if u thought so, but I wrote the volume formula for the cylinder because money9111 had asked for it (I don't know why he was asking), as for the solution of the question I know the answer is E and the question is from OG.
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by money9111 » Fri Feb 05, 2010 10:17 am
oh i was just asking because i didn't know ;-)
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