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A rectangular box has dimensions 12*10*8 inches. What is the

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Re: A rectangular box has dimensions 12*10*8 inches. What is the  [#permalink]

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New post 26 Apr 2017, 13:49
I feel like this question carries a typo.
"what is the max value of the right cylinder"..
Value of a right cylinder????

Do they mean "volume" instead of "value"?
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Re: A rectangular box has dimensions 12*10*8 inches. What is the  [#permalink]

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New post 09 Jul 2018, 11:24
Shrivathsan wrote:
a doubt on basics :
it is a very silly question.
But why are we considering volume and not surface area ?
I got confused and made a blunder in the problem



probably, surface area cannot be the value of a cylinder

thanks
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Re: A rectangular box has dimensions 12*10*8 inches. What is the  [#permalink]

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New post 09 Jul 2018, 11:32
e z prob
Max r^2 h
5^2 * 8
Answer B

Next largest volume is 4^2 * 12 Pie
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A rectangular box has dimensions 12*10*8 inches. What is the  [#permalink]

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New post 28 Feb 2019, 06:33
Bunuel wrote:
Ashamock wrote:
Why cant we have radius =6 and height = 10 making the volume 360 Pi ?


Dimensions of the box are 12*10*8 inches if radius of a cylinder is 6 then its diameter is 12 and it won't fit on any face of a box. For example it can not fit on 12*10 face of the box since diameter=12>10=side.

Complete solution:
[https://gmatclub.com/forum/posting.php?mode=quote&f=140&p=1052687#b]A rectangular box has dimensions 12*10*8 inches. What is the largest possible value of right cylcinder that can be placed inside the box?[/b]

\(volume_{cylinder}=\pi{r^2}h\)

If the cylinder is placed on 8*10 face then it's maximum radius is 8/2=4 and \(volume==\pi*{4^2}*12=196*\pi\);
If the cylinder is placed on 8*12 face then it's maximum radius is 8/2=4 and \(volume==\pi*{4^2}*10=160\pi\);
If the cylinder is placed on 10*12 face then it's maximum radius is 10/2=5 and \(volume==\pi*{5^2}*8=200\pi\);

So, the maximum volume is for \(200\pi\).

Answer: B.

Similar question to practice: http://gmatclub.com/forum/the-inside-di ... 28053.html

Hope it helps.


bb I guess,It should be \(volume==\pi*{4^2}*12=192\pi\);
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Re: A rectangular box has dimensions 12*10*8 inches. What is the  [#permalink]

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New post 18 Jun 2019, 00:24
willget800 wrote:
A rectangular box has dimensions 12*10*8 inches. What is the largest possible value of right cylinder that can be placed inside the box?

A. 180 pie
B. 200 Pie
C. 300 Pie
D. 320 Pie
E. 450 Pie


THE EXPLANATION IS AS ATTACHED.

ANSWER: OPTION B
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A rectangular box has dimensions 12*10*8 inches. What is the  [#permalink]

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New post 04 Aug 2019, 08:56
1
RobVanDam wrote:
Bunuel wrote:
Ashamock wrote:
Why cant we have radius =6 and height = 10 making the volume 360 Pi ?


Dimensions of the box are 12*10*8 inches if radius of a cylinder is 6 then its diameter is 12 and it won't fit on any face of a box. For example it can not fit on 12*10 face of the box since diameter=12>10=side.

Complete solution:
[https://gmatclub.com/forum/posting.php?mode=quote&f=140&p=1052687#b]A rectangular box has dimensions 12*10*8 inches. What is the largest possible value of right cylcinder that can be placed inside the box?[/b]

\(volume_{cylinder}=\pi{r^2}h\)

If the cylinder is placed on 8*10 face then it's maximum radius is 8/2=4 and \(volume==\pi*{4^2}*12=196*\pi\);
If the cylinder is placed on 8*12 face then it's maximum radius is 8/2=4 and \(volume==\pi*{4^2}*10=160\pi\);
If the cylinder is placed on 10*12 face then it's maximum radius is 10/2=5 and \(volume==\pi*{5^2}*8=200\pi\);

So, the maximum volume is for \(200\pi\).

Answer: B.

Similar question to practice: http://gmatclub.com/forum/the-inside-di ... 28053.html

Hope it helps.


bb I guess,It should be \(volume==\pi*{4^2}*12=192\pi\);


RobVanDam is right
Could someone please ask Bunuel to edit that to 192\(\pi\)
I guess this is going to be the rarest of rare occasions when Bunuel did a mistake, no he can't - It might have been just a typo error :)
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Re: A rectangular box has dimensions 12*10*8 inches. What is the  [#permalink]

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New post 04 Aug 2019, 12:03
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Re: A rectangular box has dimensions 12*10*8 inches. What is the   [#permalink] 04 Aug 2019, 12:03

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