Answer:
144 cm²
Step-by-step explanation:
The figure given above is a prism with triangular bases.
The surface area of a prism = 2 × area of the base (B) + perimeter of the base (P) × height of the prism (h)
Area of the base = ½ × 4 × 3 = 6 cm²
Perimeter of base = 4 + 3 + 5 = 12 cm
Height = 11 cm
Surface area of prism = 2(6) + 12 × 11
= 12 + 132 = 144 cm².
Surface area of the prism = 144 cm²
