Answer:
190 cm^2
Step-by-step explanation:
Base: 10 × 3 = 30 (×2 = 60)
Small faces: 5 × 3 = 15 (×2 = 30)
Larger faces: 5 × 10 = 50 (×2 = 100)
Add: 100 + 60 + 30 = 190
