Answer:

Step-by-step explanation:
The surface area of the triangular prism consists of three rectangles and two triangles.
Rectangle One - 5 x 12 = 60 cm^2
Rectangle Two - 4 x 12 = 48 cm^2
Rectangle Three - 3 x 12 = 36 cm^2
Triangles - 2 x 1/2 x 3 x 4 = 12 cm^2
Thus, the total surface area of the solid is 
<span>V = 1/3(3.14)r^2h
=1.046r^2h
Solving for V </span>
Step-by-step explanation:
a)

b)

Answer:
14201.63
Step-by-step explanation:
14187.63
+ 14.50
=14201.63