Question

a block of wood floats in water with 3/5of its volume above water surface . calculate the density of wood

Answer 1

Let volume of block be 3/5V
volume immersed V-3/5V=2/5V
Volume ×density×gravity=V×density×g
volume ×density×gravity=V×1 g per cm cube×g
density =2/5 =0.4 g per cm cube.