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# A right circular cylinder has a height of 20 and a radius of

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A right circular cylinder has a height of 20 and a radius of [#permalink]

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03 Dec 2005, 06:44
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A right circular cylinder has a height of 20 and a radius of 5. A rectangular solid with a height of 15 and a square base is placed in the cylinder such that each of the corners of the solid are tangent to the cylinder walls. Liqid is then poured into the cylinder such that it reaches the rim. What is the volume of the liquid?
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03 Dec 2005, 06:59
GMATT73 wrote:
A right circular cylinder has a height of 20 and a radius of 5. A rectangular solid with a height of 15 and a square base is placed in the cylinder such that each of the corners of the solid are tangent to the cylinder walls. Liqid is then poured into the cylinder such that it reaches the rim. What is the volume of the liquid?

The side of the square face of the solid= r*sqrt2= 5sqrt2--> the volume of the solid= 15*side^2= 15*(5sqrt2)^2= 750
the volume of cylinder= 20* pi*5^2= 500 pi
Liqid is then poured into the cylinder such that it reaches the rim ---> I guess it means the liquid was poured into the cylinder till the cylinder is full ---> the volume of the liquid= 500pi -750
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06 Dec 2005, 23:09
Diameterof circle is equal to diagonal of the square. Side =diagonal/sq. root 2=10/sq. root 2. Area of rect. solid=100/2*15=750
Then I got lost.
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07 Dec 2005, 11:44
I agree with the cylinder volume, but why do u divide the 100 by 2?
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07 Dec 2005, 21:58
OA is 500pi-750

OE is Laxie Time to jump back into the Math forum for awhile...
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