Neco 2025 Geography Question 11
Practice objective / multiple choice question 11 from the 2025 Neco Geography examination.
A rock sample consists of \(70\%\) quartz and \(30\%\) calcite by mass. The densities are \(2.65\ \text{g/cm}^3\) for quartz and \(2.71\ \text{g/cm}^3\) for calcite. If the measured bulk density of the rock (including pores) is \(2.55\ \text{g/cm}^3\), calculate the porosity of the rock as a percentage.
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About This Question
This is Neco 2025 Geography Question 11. It is one of the objective questions from the 2025 Neco Geography examination.
Difficulty level: Medium .
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