Answer:
268.3 cm³
Step-by-step explanation:
Surface area of triangular pyramid = Base Area + ½*(perimeter of base)(height of pyramid)
Base area = 43.3 cm²
Perimeter of base = 10 + 10 + 10 = 30 cm
Height of pyramid = 15 cm
Plug in the values
Surface area = 43.3 + ½(30)(15)
Surface area = 43.3 + 225
= 268.3 cm³
