JAMB Physics 2013 Objective — Question 15

Question 15 of 50 from the Joint Admissions and Matriculation Board (JAMB) Physics 2013 Objective paper, with the correct answer and a full explanation.

What volume of alcohol will have the same mass as 4.2m³ of petrol? [Density of alcohol=8.4×10²kgm⁻³, density of petrol=7.2×10²kgm⁻³]

A. 0.8m³
B. 1.4m³
C. 3.6m³Correct
D. 4.9m³

Explanation

Mass of petrol = density×volume = 7.2×10²×4.2 = 3024kg. Volume of alcohol = 3024/840 = 3.6m³.

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