Question

A neckless weighing 50 g in air, but it weighs 46 g in water. Assume copper is mixed with gold to prepare the neckless. How much copper is present in it? (specific gravity of gold is 20 and that of copper is 10)

Answer 1

Answer:

in air the total weight is 50g int his copper is present is 50g-10g+20g=20g

and in water the copper is present is 46g-16g+6g=24g