Alright, lets get started.
If you have a density of 3g/ml and a volume of 10 ml
means density = 3 g / ml
Volume = 10 ml
Formula for density, mass, volume will be
![density = (mass)/(volume)](https://img.qammunity.org/2019/formulas/chemistry/high-school/v3hogfvrx8srjmny3evdeflv1zvyx5heu9.png)
Plugging the value
![3 = (mass)/(10)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/9tdk5gwmli15bv5ehkyxbo63z9b7nzf6y0.png)
Multiplying 10 in both sides
![10*3 = (mass)/(10) *10](https://img.qammunity.org/2019/formulas/mathematics/middle-school/jod88qxvtlof9a3y0lgui2p2yxg2gvrqrp.png)
mass = 30 gm
Hence the answer is 30 gm. : Answer
Hope it will help :)