Find the Volume of the Described Solid $x ^ { 2 } + y ^ { 2 } \leq 9$

question 119

Multiple Choice

Find the volume of the described solid.
-The base of the solid is the disk $x ^ { 2 } + y ^ { 2 } \leq 9$ . The cross sections by planes perpendicular to the $y$ -axis between $y = - 3$ and $y = 3$ are isosceles right triangles with one leg in the disk.

• A) 90
• B) 18
• C) 72
• D) 144

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