1)
Al= (6+6+6+6)×20=24×20=480m²
At= 480+2(6×6)=480+72=552m²
V= 6×6×20=720m³
2)
Al= 5(3)×10=150m²
At= 150+2(15×2/2)=150+30=180m²
V= 15×2/2×10=150m³
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Verified answer
1)
Al= (6+6+6+6)×20=24×20=480m²
At= 480+2(6×6)=480+72=552m²
V= 6×6×20=720m³
2)
Al= 5(3)×10=150m²
At= 150+2(15×2/2)=150+30=180m²
V= 15×2/2×10=150m³