JAMB Physics 2015 Objective — Question 27
Question 27 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2015 Objective paper, with the correct answer and a full explanation.
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An empty relative density bottle has a mass of 30g. When filled with paraffin, its mass is 70g. Calculate the mass of the bottle when it is filled with water. [Relative density of paraffin = 0.8]
- A. 40g
- B. 20g
- C. 60g
- D. 80gCorrect
Explanation
Mass of paraffin = 40g. R.D = mass of paraffin/mass of equal volume of water ⟹ mass of water = 40/0.8 = 50g. Mass of bottle+water = 50+30 = 80g.
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