a jeweller sold a set of bangles weighing 25.25 g .when the weight of the bangles was measured in water, the purchaser found it to be 23.075 g.the relative density of gold is 19.3. find out if the bangles were made of pure gold or not.

Asked by lokhhi | 4th Dec, 2010, 04:50: PM

Expert Answer:

let volume of bangles is V and weight in water is W2 and weight in air is W1 . And let density of water be ρ and that of gold be ρg. then   
 
whereas actual relative density of gold is 19.3
it implies bangles contain lesser amount of gold.
therefore bangles were not made of pure gold.

Answered by  | 8th Dec, 2010, 11:11: PM

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