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# If a rectangular block that is 4 inches by 4 inches by 10

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If a rectangular block that is 4 inches by 4 inches by 10 [#permalink]  01 Apr 2006, 22:05
If a rectangular block that is 4 inches by 4 inches by 10 inches is placed inside a right circular cylinder of radius 3 inches and height 10 inches,the volume of the unoccupied portion of the cylinder is how many cubic inches?

a)6pi-16
b)9pi-16
c)160-30pi
d)60pi-160
e)90pi-160
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Volume of rectangular block = 160..... (4*4*10)

Volume of the cylinder = 90 pi....... (9pi*10)

The unoccupied are = Volume of the cylinder - volume of rectangular block = 90pi-160
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E

Volume of the Cylinder - Rec Block

pi(R^2)H - lbh
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