The surface area is calculated as
The side area is calculated as
![\begin{gathered} \text{side area= base perimeter }* height \\ =74\operatorname{mm}*10\operatorname{mm}=740\operatorname{mm}^2 \end{gathered}]()
The base area and the top area are the same. The base area has been given. Therefore, the total surface area would be
![\begin{gathered} \text{Total surface area =} \\ 740\operatorname{mm}+254\operatorname{mm}+254\operatorname{mm}=1248\operatorname{mm}^2 \end{gathered}]()
The volume of the prism would be calculated by
![\begin{gathered} \text{Volume}=\text{Base area }* height \\ \text{Volume}=254\operatorname{mm}^2*10\operatorname{mm} \\ =2540\operatorname{mm} \end{gathered}]()
Hence, the surface area is 1248mm² and the volume is 2540mm³