Answer:
[tex]\boxed{\underline{\tt Surface\: area= 123 cm^2}}[/tex]
Step-by-step explanation:
Surface area of the triangular prism:
[tex]\tt [(5\times4)+(7\times 5)+(8\times 5)+1/2(7\times 4)+1/2(7\times4)] cm^2[/tex]
[tex]\tt [20+35+40+14+14] cm^2[/tex]
[tex]\tt [60+63]cm^2[/tex]
[tex]\tt 123cm^2[/tex]
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