Answer:
430 cm²
Step-by-step explanation:
This is a prism with base 10×11 and height 5cm.
Base area: 2 bases: 2×11×10=220cm²
Perimeter of base: p=2×(11+10)=2×21=42cm
Side area: p×height=42×5=210cm²
Total area: base area + side area
Total area: 220+210=430cm²
