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Math·Geometry and Trigonometry·Area and volume

hard

In the figure, a hollow steel pipe is in the shape of a right circular cylinder. The steel pipe has an outside diameter of 48 inches, a wall thickness of $\frac{3}{8}$ inches, and a height of 138 inches. Which of the following is closest to the volume, in cubic inches, of the wall of this steel pipe?

A

61

B

325

C

1,242

D

7,743