Why does aluminum foil sink in water, but a boat made of the same foil floats?

Due to the shape of the boat, the volume of water displaced by it is much greater than the volume of the foil from which the boat is made.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.