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The image depicts a three-dimensional geometric figure that appears to be a combination of a triangular prism and a rectangular prism. To solve any problem related to this figure, we need to identify its components and understand its structure. Below is a step-by-step explanation of how to approach such a problem:

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Step 1: Identify the Components

The figure can be broken down into two main parts:
1. Triangular Prism: On the left side of the figure, there is a triangular prism. A triangular prism has two triangular bases and three rectangular lateral faces.
2. Rectangular Prism: On the right side of the figure, there is a rectangular prism. A rectangular prism has six faces, all of which are rectangles.

These two prisms are connected along one of their rectangular faces, forming a composite solid.

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Step 2: Understand the Dimensions

To solve problems involving volume, surface area, or other geometric properties, we need the dimensions of the figure. These dimensions typically include:
- For the triangular prism:
- The base of the triangle (length and width).
- The height of the triangle.
- The length of the prism (the distance between the two triangular bases).
- For the rectangular prism:
- The length, width, and height of the prism.

If these dimensions are not provided in the problem, we cannot compute specific numerical values. However, we can still describe the general formulas and approaches.

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Step 3: Calculate the Volume

The volume of the composite solid is the sum of the volumes of the triangular prism and the rectangular prism.

#### Volume of the Triangular Prism
The formula for the volume of a triangular prism is:
\[
V_{\text{triangular prism}} = \text{Base Area of Triangle} \times \text{Height of Prism}
\]
If the base of the triangle is a right triangle with legs \(a\) and \(b\), the area of the base is:
\[
\text{Base Area} = \frac{1}{2}ab
\]
Thus, the volume is:
\[
V_{\text{triangular prism}} = \left(\frac{1}{2}ab\right) \times h_{\text{prism}}
\]

#### Volume of the Rectangular Prism
The formula for the volume of a rectangular prism is:
\[
V_{\text{rectangular prism}} = \text{Length} \times \text{Width} \times \text{Height}
\]
Let the dimensions of the rectangular prism be \(l\), \(w\), and \(h\). Then:
\[
V_{\text{rectangular prism}} = l \times w \times h
\]

#### Total Volume
The total volume of the composite solid is:
\[
V_{\text{total}} = V_{\text{triangular prism}} + V_{\text{rectangular prism}}
\]

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Step 4: Calculate the Surface Area

The surface area of the composite solid is the sum of the surface areas of the triangular prism and the rectangular prism, minus the area of the face where they are connected (since it is internal and not part of the external surface).

#### Surface Area of the Triangular Prism
The surface area of a triangular prism consists of:
- Two triangular bases.
- Three rectangular lateral faces.
The formula is:
\[
\text{Surface Area}_{\text{triangular prism}} = 2 \times (\text{Base Area of Triangle}) + \text{Perimeter of Triangle} \times \text{Height of Prism}
\]

#### Surface Area of the Rectangular Prism
The surface area of a rectangular prism is:
\[
\text{Surface Area}_{\text{rectangular prism}} = 2(lw + lh + wh)
\]

#### Adjust for the Shared Face
When the two prisms are connected, one rectangular face of the triangular prism and one face of the rectangular prism are shared and do not contribute to the external surface area. We need to subtract the area of this shared face from the total surface area.

#### Total Surface Area
The total surface area is:
\[
\text{Surface Area}_{\text{total}} = \text{Surface Area}_{\text{triangular prism}} + \text{Surface Area}_{\text{rectangular prism}} - \text{Area of Shared Face}
\]

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Step 5: Solve the Specific Problem

Without specific dimensions provided in the image or problem statement, we can only outline the general approach. If dimensions were given, we would substitute them into the formulas above to compute the exact volume and surface area.

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Final Answer

If the problem asks for the volume or surface area, the final answer would be in the form of a formula or a numerical value depending on the given dimensions. Since no dimensions are provided in the image, the solution is:

\[
\boxed{\text{See steps above for formulas and approach. Provide dimensions for numerical solutions.}}
\]