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`        An ornament weighing 50 grams in air weighs only 46 grams in water. Assuming that some copper mixed with gold to prepare the ornaments and the specific gravity of gold is 20 and that of copper is 10 the amount of copper in it is?`
2 years ago

## Answers : (1)

Utsav Basu
70 Points
```							Weight in air = 50gWeight in water = 46Reduction in weight = 4g
Thus, Volume of solid = 4cm3
Let xcm3 of the solid be Cu.
So, 10x + 20(4 – x) = 50
or,  x = 3
Thus, 3cm3 of Cu is present.
or, 3 * 10gm of Cu is present.
or, k = 3

```
2 years ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions