Growth in human brain from new born to adult is
In human beings, the weight of the brain increases from 100gm to 1kg from new born baby to adults.
Two miscible fluids of densities 1.2 gm/cm3 and 1.4 gm/cm3 are mixed with a proportion of their volumes equal to 3:5. Assuming both fluids to be perfectly miscible, what is the density of resulting liquid?