A cuboid glass fish tank without cover, measured from the outside, is 6.4 decimeters long, 5.2 decimeters wide and 5.2 decimeters high?

A cuboid glass fish tank without cover, measured from the outside, is 6.4 decimeters long, 5.2 decimeters wide and 5.2 decimeters high?

2 cm = 0.2 decimeter, (6.4-0.2 × 2) × (5.2-0.2 × 2) × (5.2-0.2), = 6 × 4.8 × 5, = 144 (cubic decimeter); answer: the maximum volume of fish tank is 144 cubic decimeter

Xiao Ming has a cuboid glass fish tank, 2.2 decimeters long, 3.2 decimeters wide, 6 decimeters. The glass is 1 cm thick. What is the volume of this fish tank?

The total volume of cuboid glass fish tank is (2.5 × 3.2 × 3.6) square decimeter, and the glass volume is (2.5 × 3.2 × 0.1 + 3.2 × 3.6 × 0.1 × 2 + 2.5 × 3.6 × 0.1 × 2) square decimeter
Total volume - glass volume

A cuboid fish tank without cover is 8 decimeters long and 6 decimeters wide. How much glass does it need to make such a fish tank

8 * 5 * 2 + 6 * 5 * 2 + 8 * 6 = 188 square decimeters