Inside a large tank at an oil refinery, three oils with different densities are combined. No chemical reaction takes place. The blend contains: $1200\,\text{kg}$ of oil with density $1100\,\text{kg m}^{-3}$ $1500\,\text{kg}$ of oil with density $860\,\text{kg m}^{-3}$ $4000\,\text{kg}$ of oil with density $910\,\text{kg m}^{-3}$ What is the density of the blend?
- A$927\,\text{kg m}^{-3}$
- B$933\,\text{kg m}^{-3}$
- C$957\,\text{kg m}^{-3}$
- D$1045\,\text{kg m}^{-3}$