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JAMB Physics 1984 Question 4

Question 4

Density and Upthrust

What volume of alcohol with a density of 8.4 × 102 kg m−3 will have the same mass as 4.2 m3 of petrol whose density is 7.2 × 102 kg m−3?

  1. A.1.4 m3
  2. B.3.6 m3
  3. C.4.9 m3
  4. D.5.0 m3
  5. E.5.8 m3.
Show the answer and explanation

Answer: B (3.6 m3)

Explanation

Mass of petrol = 4.2 × 720 = 3024 kg. Volume of alcohol = 3024 ÷ 840 = 3.6 m3.