The following is an expanded view of a cuboid carton (1) How much iron sheet does it need to make this iron box? (2) What is the volume of this iron box in milliliter Unit centimeter

The following is an expanded view of a cuboid carton (1) How much iron sheet does it need to make this iron box? (2) What is the volume of this iron box in milliliter Unit centimeter

（1）
30 * 20 + 2 * 5 * 30 + 2 * 5 * 20 = 600 + 300 + 200 = 1100 square centimeter
（2）
30 * 20 * 5 = 3000 CC = 3000 ml

A 5 cm long, 4 cm wide, 3 cm high open cuboid carton who help me draw

The following is an expanded view of a rectangular box. How much iron sheet does it need to make this box? (unit: cm)

（30*5+20*5）*2+30*20
=（150+100）*2+30*20
=250*2+30*20
=500+600
=1100 (square centimeter)