Question

a wooden block floats in water with two third of its volume submerged
a)calculate the density of the world
b)when the same block is placed in oil, three quarter of its volume is immersed in oil. calculate the density of oil.

Answer 1

Let D be the density of wood

Density of wood / Density of Water = Part of block submerged / Total Part

D / 1 = 2V/3  / 1V

D/ 1 = 2/3

D = 2/3

= 0.67 g / cm3

Again , 3V/4 / 1 V = 0.67 / D

3/4 = 0.67 / D

D = 0.87 g/ cm3

Answer 2

Answer:

(a) 667 kgm-³

(b) 889 kgm-³