Question

If two densities of two liquids are $2\frac{kg}{m^3}$ and $3\frac{kg}{m^3}$, their volumes are $5lit$ and $6lit$. Find the mixed density of two liquids $[hint:-1lit=1kg]$

• A. $\frac{11}{28}kg{m}^{-3}$
• B. $\frac{13}{28}kg{m}^{-3}$
• C. $\frac{28}{11}kg{m}^{-3}$
• D. $\frac{12}{28}kg{m}^{-3}$

Answer 1

Answer: (C)

$\frac{28}{11}kg{m}^{-3}$

$\text{density}=\frac{\text{total mass}}{\text{total vol.}}$

$=\frac{(2\times 5)+(3\times 6)}{5+6}$

$=\frac{28}{11}{kgm}^{-3}$

$\text{Answer:}\left(C\right)\frac{28}{11}kg{m}^{-3}$