1.5 HP is about 1100 watts. Why do 1.5 HP air conditioners use 2 square copper wires? Is 1 square copper wire OK

1.5 HP is about 1100 watts. Why do 1.5 HP air conditioners use 2 square copper wires? Is 1 square copper wire OK

2.5 square copper core wire should be used. The cooling power of 1.5 HP air conditioner is about 1100 watts, but the power of auxiliary electric heater is between 600-900 watts in winter, and the power of compressor is nearly 2000 Watts, so 2.5 square copper core wire must be used

A cuboid with a length of 40 cm and a square cross section will increase its surface area by 80 square cm if its length is increased by 5 cm,
How to find the surface area and volume of the original cuboid?

The increase of surface area is side area = 4 side length × 5 = 80 square centimeter
Side length = 80 / 20 = 4cm
The surface area of the original cuboid is 2 * 4 * 4 + 4 * 4 * 40 = 672 square centimeters
Volume = 4 * 4 * 40 = 640 CC

A cuboid with a length of 40 cm has a square cross section. If the length is increased by 5 cm, the surface area will be increased by 80 square cm. What is the volume of the original cuboid?
I may ask you,

80 divided by 5 equals 16, 16 equals 4 times 4, so the side length of a square is 4cm
40 times 4 times 4 is 640