Question

how do you get total density? is it \[\rho_1 + \rho_2 = \rho_t\]
or \[\frac{m_1}{V_1} + \frac{m_2}{V_2} = \frac{m_t}{V_t}\]

Answer 1

Neither.\[\frac{m_t}{V_t} = \frac{m_1 + m_2}{V_1 + V_2}\]

Answer 2

yes. that's what i meant