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**Hrslvr1612****Member**- Registered: 2005-12-12
- Posts: 13

A cylindrical water bottle is 28 cm in diameter. how many centimeters does the water level drop when on liter is drawn off?

Please help!! thank you so much!!

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**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

1000 / (196 pi)

**igloo** **myrtilles** **fourmis**

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**Hrslvr1612****Member**- Registered: 2005-12-12
- Posts: 13

I dont understand what you mean

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**John E. Franklin****Member**- Registered: 2005-08-29
- Posts: 3,588

Okay, I just ate supper, but now I'm back.

1 CC is 1 ml, so 1000 ml = 1000 cubic centimeters.

A CC is about the size of a sugar cube.

The 196 comes from 14 times 14 because pi r squared is area of a circle.

So I divided 1000 milliliters (1 liter) by the circle area to get the height.

Units: cm cubed divided by cm squared is cm

3-D (cubed) divided by 2-D slice (the circle area) = height of cylinder.

*Last edited by John E. Franklin (2006-04-16 11:43:26)*

**igloo** **myrtilles** **fourmis**

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**Hrslvr1612****Member**- Registered: 2005-12-12
- Posts: 13

o ok thanks

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