Because the mass is 49 1 g and the volume is 30 cubic centimeters,
Therefore, according to the density = mass/volume, the actual density is 16.367g/cm3.
According to the cross method, find out the proportion of gold and silver: (cross method, right? )
19.3 5.867
16.367
10.5 2.933
So gold/silver = 5.867/2.933 = 2/ 1.
The above ratio can be regarded as volume ratio.
So there is gold 20 cm3 and silver 10 cm3.
The converted mass is: gold 386g, silver 105g.
If calculated by percentage, the mass percentage of silver is 2 1.38%.
I hope you can understand, welcome to ask and hope to adopt.