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gold has relative density 19.3 Bhumika purchase a bangle wearing 25. 250 gram she is so the bangle to her son studying in class 11th Utkarsh with the angle by reversing its impure water he found that weight of bangle in water was 23.0 75 gram he told mother that bangle was not made of pure gold she didn't the Bangle to the Jeweller how did this happen

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Solution

$D e a r S t u d e n t l o s s o f w e i g h t i n w a t e r = 25.250 - 23.075 = 2.175 g l o s s o f w e i g h t i n w a t e r = m a s s o f d i s p l a c e d w a t e r = (v o l u m e o f d i s p l a c e d w a t e r) \times (d e n s i t y o f w a t e r) i f w e c o n s i d e r d e n s i t y o f w a t e r = 1 \frac{g}{c c} , t h e n, v o l u m e o f d i s p l a c e d w a t e r = v o l u m e o f b a n g l e = 2.175 c m^{3} m a s s o f b a n g l e, i f i t i s m a d e b y p u r e g o l d o f r e l a t i v e d e n s i t y 19.3 = 2.175 \times 19.3 = 42 g C o n c l u s i o n : - B a n g l e i s n o t m a d e b y p u r e g o l d o f r e l a t i v e d e n s i t y 19.3 R e g a r d s$

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Q. A jeweller claims that he sells ornaments made of pure gold that has the relative density of 19.3. He sold a bangle weighing 25.25 gf to a person. The clever customer weighs that bangle when immersed in pure water and finds that it weighs 23.075 gf in water. Is the ornament made by pure gold?

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