Given:
The sides of a rectangle are,
[tex]\begin{gathered} a=1.4m \\ b=2.3m \\ c=2.7m \end{gathered}[/tex]The length of the prism is, l=0.7m
To find the surface area of the ramp:
The formula of the surface area of the right triangular prism is,
[tex]\begin{gathered} A=(a+b+c)l+ab \\ =(1.4+2.3+2.7)(0.7)+(1.4)(2.3)_{} \\ =4.48+3.22 \\ =7.7\text{ square meters} \end{gathered}[/tex]Thus, the surface area of the right triangular prism is 7.7 square meters.