Question 1159295
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The increment of the volume occupied in the container (after submerging the body) is equal to  1.8*3*3 = 16.2 cubic centimetres.


Obviously, it is exactly the volume of the metal body.


So, the mass of the body is 45 grams and the volume is 16.2 cubic centimetres.


Hence, the density of the metal is  {{{45/16.2}}} = 2.77 grams per cubic centimetre.



Now look into the standard Tables of density metals in the Internet

https://www.engineersedge.com/materials/densities_of_metals_and_elements_table_13976.htm

and you will identify Aluminium.      <U>ANSWER</U>
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