A body weighs 20 g in the air, 18.2 g in a liquid and 18.0 g in water. Calculate the relative density of the liquid.

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0.8

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0.9

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1.2

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Solution

The correct option is C 0.9
$R e l a t i v e d e n s i t y o f l i q u i d$
$= \frac{l o s s o f w e i g h t o f s o l i d i n l i q u i d}{l o s s o f w e i g h t o f s o l i d i n w a t e r}$
$= \frac{20 - 18.2}{20 - 18} = \frac{1.8}{2} = 0.9$

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