A 3m3 volume of liquid W of density 200kgm3 is mixed with another liquid L of volume 7m3 and density 150kgm-3. the density of mixture is?
A. 165kgm-3 B. 100kgm-3 C. 265kgm-3 D. 350kgm-3
Correct Answer: A
Explanation
For liquid W, its mass = vol. x density = 3 x 200 =600kg. similarly, for liquid L, its mass = 7 x 150 = 1050kg ∴ Total mass of mixture = 600kg + 1050kg =1650kg. similarly total vol.of the mixture = 3m3 + 7m3 =10m3. ∴ density of the mixture = (Total Mass)/Total Mixture = (1650kg)/10m3 =165kgm-3
