Answer:
B) 23 cm2
Step-by-step explanation:
we know that
The surface area of the triangular prism is equal to the area of three rectangular faces plus two triangular faces
Convert mixed number to improper fractions
[tex]2\frac{1}{2}=2+\frac{1}{2}=\frac{5}{2}\ cm[/tex]
[tex]3\frac{1}{2}=3+\frac{1}{2}=\frac{7}{2}\ cm[/tex]
[tex]1\frac{1}{2}=1+\frac{1}{2}=\frac{3}{2}\ cm[/tex]
so
[tex]SA=2[(3)(\frac{3}{2})]+[(\frac{7}{2})(\frac{3}{2})]+2[\frac{1}{2}(\frac{7}{2})(\frac{5}{2})][/tex]
[tex]SA=9+5.25+8.75=23\ cm^2[/tex]
