Answer:
Part 1) The volume of the composite figure is 
Part 2) The surface area of the composite figure is 

Step-by-step explanation:
Part 1) Find the volume of the composite figure
we know that
The volume of the figure is equal to the volume of a cone plus the volume of a hemisphere
<em>Find the volume of the cone</em>
The volume of the cone is equal to

we have

Applying Pythagoras Theorem find the value of h

substitute


<em>Find the volume of the hemisphere</em>
The volume of the hemisphere is equal to

we have

substitute


therefore
The volume of the composite figure is equal to

Part 2) Find the surface area of the composite figure
we know that
The surface area of the composite figure is equal to the lateral area of the cone plus the surface area of the hemisphere
<em>Find the lateral area of the cone</em>
The lateral area of the cone is equal to

we have


substitute


<em>Find the surface area of the hemisphere</em>
The surface area of the hemisphere is equal to

we have

substitute


Find the surface area of the composite figure
