A cubical box of wood of side 30 cm weighting 21.6 kg floats on water with two faces horizontal. Calculate the depth of immersion of wood.

Explanation

For a floating body, the weight of displaced liquid should be equal to the weight of the block. Let x be the depth of immersion. Then
(`x xx 30 xx 30)xx1xxg=21.6xx10^(3)xxg`
`impliesx=(21.6xx10^(3)xxg)/(30xx30xxg)=24cm`