Answer:
Ro = 1000 [kg/m³]
Step-by-step explanation:
We must remember that density is defined as the relationship between mass and volume.
![Ro=m/V\\](https://img.qammunity.org/2022/formulas/physics/high-school/xax0ze87u0mc3g2nlljc5bwjs7l150dlb2.png)
where:
Ro = density [kg/m³]
m = mass = 3 [kg]
V = volume = 3000 [ml]
We must convert the volume of milliliters to cubic meters
![3000[ml]*(0.001Lt)/(1ml)*(1m^(3) )/(1000Lt) = 0.003m^(3)](https://img.qammunity.org/2022/formulas/physics/high-school/48rkxbl1b71wdr39q9hdynphyq8l3no08a.png)
Now replacing:
![Ro=3/0.003\\Ro=1000[kg/m^(3) ]](https://img.qammunity.org/2022/formulas/physics/high-school/ug85sv3duoz3d190q99fyff57n1r5a0qpz.png)