Answer:
SA = 74.4 square yards
V = 32.7 cubic yards
Step-by-step explanation:
formula for SA for square pyramid: Area of Base + Area of 4 Triangles
SA = 3² + 4[(3 x 10.9) ÷ 2]
= 9 + 4(16.35)
= 9 + 65.4
formula for Volume for square pyramid: 1/3 · Area of Base · Height
V = 1/3 · 9 · 10.9
= 3 × 10.9
= 32.7
