A cork weigh 2.5 gf in air. When tied to a sinker, the total weight is 20 gf in water. If the sinker alone weighs 25gf in water, find the density of the cork

0.333

Explanation:

Weight of the sinker in water = 25gf

Weight of cork in air and sinker in water = 25gf + 2.5gf

= 27.5gf

Weight of the cork and sinker in water = 20gf

Loss of weight of cork in water = 27.5 - 20 = 7.5gf

Rd of cork = weight of cork in air / loss of weight of cork in water

= 2.5/7.5

= 1/3

= 0.333

Hence the Relative density of the cork is 0.333