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.