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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

Consider this problem : http://i1069.photobucket.com/albums/u472/tina12354/exam.png

I wanna divide a rectangle into two blocks where 1st block should have 30% of total block . any idea ..

How to do it ?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

Hi;

Maximum percentage of what?

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

bobbym wrote:

Hi;

Maximum percentage of what?

sorry .....

I meant to say , 1st block have minimum percentage as compare to 2nd block.

say block 1 have 30% and block2 is 70% .

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

Hi tina123;

I have the same question. Percentage of what? Area? Points?

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

bobbym wrote:

Hi tina123;

I have the same question. Percentage of what? Area? Points?

area ...

percentage of block1 area ,,

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

Hi;

How do you want to split the big rectangle up? With one line or more than one line. Please look at the drawings.

**In mathematics, you don't understand things. You just get used to them.I have the result, but I do not yet know how to get it.All physicists, and a good many quite respectable mathematicians are contemptuous about proof.**

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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

bobbym wrote:

Hi;

How do you want to split the big rectangle up? With one line or more than one line. Please look at the drawings.

like 1st figure. i meant by one line .

*Last edited by tina123 (2012-09-10 01:00:40)*

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

For the 8 x 16 rectangle you have in the picture. This is one answer.

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

bobbym wrote:

For the 8 x 16 rectangle you have in the picture. This is one answer.

hy .. bottom block is small .

second block should be 1st block.

I want 30% area should be for 1st block and the rest 70% area should be for 2nd block .

you did opposite .

and please let be know how did u do that .

thanks

*Last edited by tina123 (2012-09-10 01:41:03)*

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

Hi;

You want the top block to be the small one?

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

bobbym wrote:

Hi;

You want the top block to be the small one?

yes

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

Try this one then.

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

bobbym wrote:

Try this one then.

you did not mention that how did u do that .

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

Hi;

30% of ( 8 * 16 ) is 38.4. You need a rectanghle with an area of 38.4.

The width is 8 so we can only adjust the length from 0 to 16. We solve that with algebra.

L = 4.8

So the dimensions of the rectangle are 4.8 x 8. See the drawing.

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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**tina123****Member**- Registered: 2012-04-29
- Posts: 83

bobbym wrote:

Hi;

30% of ( 8 * 16 ) is 38.4. You need a rectanghle with an area of 38.4.

The width is 8 so we can only adjust the length from 0 to 16. We solve that with algebra.

L = 4.8

So the dimensions of the rectangle are 4.8 x 8. See the drawing.

k alright thanks

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 84,613

Hi;

Are you clear on what I did?

I have the result, but I do not yet know how to get it.

All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

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