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JAMB Physics 2005 Question 46

Question 46

Density and Upthrust

A 3 m3 volume of liquid W of density 200 kgm−3 is mixed with another liquid L of volume 7 m3 and density 150 kgm−3. The density of the mixture is

  1. A.265 kgm−3.
  2. B.165 kgm−3.
  3. C.100 kgm−3.
  4. D.350 kgm−3.
Show the answer and explanation

Answer: B (165 kgm−3.)

Explanation

Total mass = 3 × 200 + 7 × 150 = 1650 kg; total volume = 10 m3; density = 165 kg m−3.