1 Answer

Targhs · Answer 1 · 2020-03-17T09:38:13+0000

Answer:

$V=168\pi\ m^3$

Explanation:

we know that

The volume of the figure is equal to the volume of the complete cylinder minus the hollow area.

The volume of a cylinder is equal to

$V=\pi r^(2)h$

so

The volume of the figure is

$V=\pi r_1^(2)h-\pi r_2^(2)h$

we have

$r_1=9\ m\\r_2=5\ m\\h=3\ m$

substitute

$V=\pi (9)^(2)(3)-\pi (5)^(2)(3)$

$V=168\pi\ m^3$

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