How the boat floating

The boat that we're paddling in the sea, Don't you doubt why it can floating  on the water.

  

          It's because Buoyancy force How's work from theorem of Archimedes said  buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces. 

          So it can float because density of water just 1 and almost of  boat have to build by something that have calculate to floating on the water.