5 meters long, 4 meters wide, 2 meters high house painting, assuming that each layer of paint is 1 mm thick, how many liters of paint do you need

5 meters long, 4 meters wide, 2 meters high house painting, assuming that each layer of paint is 1 mm thick, how many liters of paint do you need

The paint should not be painted on the ground
Therefore, the surface area to be painted is 5 × 4 + 5 × 2 × 2 + 4 × 2 × 2 = 56 square meters = 5600 square decimeters
Volume = 5600 square decimeters × 0.01 decimeters = 56 cubic decimeters = 56 liters

Help! A floor tile area is 0.64 square meters, the price is 99 yuan / piece, what is the unit price of a square meter?

99 △ 0.64 = 154.6875 yuan

See a math problem: the room area is 48 square meters, the edge length is 50 mm floor tiles, how many bricks in total?
0.5 * 0.5 = 0.25 48 / 0.25 = 192 yuan,
After asking the question, I also think it should be 50cm.

The side length of 50 mm is 0.05 M. think about how small the brick is
Its area is 0.05 * 0.05 = 0.0025 square meters
And 48 / 0.0025 = 19200 yuan

Find a different number from 8, 12, 16, 24, 28 and 30, and explain your division

The multiple of 2: 8, 12, 16, 24, 28, 30; the multiple of 3: 12, 24, 30; the multiple of 5: 30; because only 30 is the multiple of 2, 5 and 3, the unique number is 30