Verified Answer :

6375 \(\pi\) ft^3

Answer: \(51\pi\ ft^3\)

Step-by-step explanation:

From the given figure ,

Dimensions of cone : Height = 5 ft

Radius = 3 ft

The volume of cone is given by :

\(V=\dfrac{1}{3}\pi r^2\ h\), where r is the radius and h is height  of the cone .

\(\Rightarrow V=\dfrac{1}{3}\pi (3)^2(5)=15\pi\ ft^3\)

Dimensions of cylinder : Height = 4 ft

Radius = 3 ft

The volume of cylinder is given by :

\(V=\pi r^2\ h\), where r is the radius and h is height  of the cone .\(\Rightarrow V=\pi (3)^2(4)=36\pi\ ft^3\)

Now, the total volume of the figure: \(15\pi+36\pi=51\pi\ ft^3\)