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Grade: 11
        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?
10 months ago

Answers : (1)

Utsav Basu
69 Points
							
Weight in air = 50g
Weight in water = 46
Reduction 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
 
10 months ago
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