A wooden block is tied to a metallic rod of mass 100 g and immersed completely inwater. When the displaced water is collected in water.

Explanation

Mass of the metallic rod = 100 g
Volume of the metallic rod + volume of wooden block = 400 ml
Density of the metallic rod = 5 g `cm^(-3)`
Volume of the metallic rod
=` mass of the metallic rod/density of the rod` =`8/1=n^(3)/1,n^(3)=8, n=2` Volume of wooden the block = `400-20 = 380 cm^(3)`
Mass fo the wooden block =`"mass"/"volume"=300/380=0.79" g "cm^(-3)`