Answer: it’s 93cm^
Step-by-step explanation:
remember that the bottom of the triangular prism/top base don’t count as surface area.
first equation for the surface of the triangular prism: 1/2ps = 1/2•12•4 = 24m
add it to the surface area of the rectangular prism: 3•3 + 5•3•4 = 69m
then simply add them
your answer is 93m^!
enjoy :))
