Find the Volume of the Described Solid $y = 3 \cos x$

question 38

Multiple Choice

Find the volume of the described solid.
-The base of a solid is the region between the curve $y = 3 \cos x$ and the $x$ -axis from $x = 0$ to $x = \pi / 2$ . The cross sections perpendicular to the $x$ -axis are squares with bases running from the $x$ -axis to the curve.

• A) \(2 \pi\)
• B) \(\frac { 3 } { 2 } \pi\)
• C) \(\frac { 9 } { 2 } \pi\)
• D) \(\frac { 9 } { 4 } \pi\)

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