Put two cuboids that are 8 cm long, 6 cm long and 5 cm high together to form a large cuboid. How many square centimeters is the maximum surface area of this large cuboid?

Put two cuboids that are 8 cm long, 6 cm long and 5 cm high together to form a large cuboid. How many square centimeters is the maximum surface area of this large cuboid?

The maximum surface area is: (8 × 6 + 8 × 5 + 6 × 5) × 2 × 2-6 × 5 × 2. = (48 + 40 + 30) × 2 × 2-60, = 118 × 2 × 2-60, = 412 (square centimeter); a: the maximum surface area of this cuboid is 412 square centimeter