Question

A boat weighing 200 kg floats on water.what is the weight of the water displaced

Answer 1

The weight of water displace is equal to the weight of boat  i.e, 200kg.
According to Archimedes Principle..... 

Answer 2

The water displaced is 200 kg

Given:

The weight of the boat = 200kg

To find:

The weight of water which is displaced

Solution:

According to Archimedes' principle, in condition of floating

An object floats on liquid surface or floating submerged in fluid, then weight of the displaced liquid is equal to weight of the object.  

Thus, a boat floats if any boat displaces the weight of water which is equal to weight of that boat.  

Every ship and submarine should be designed in such a way that it could displace weight of fluid which is equal to weight of the ship or submarine.

Now,

Given that weight of boat floating on water = 200 kg.

Thus by following the rule of Archimedes' principle, weight of water ‘displaced’ = weight of boat = 200 kg