Gce Model Questions Vol1 2020 Geography Question 47
Practice objective / multiple choice question 47 from the 2020 Gce Model Questions Vol1 Geography examination.
A region contains a total rock mass of \(2.5\times10^{9}\) tonnes. Initially the mass is distributed as 40 % igneous, 30 % metamorphic and 30 % sedimentary. Each million years igneous rock forms at 2 % and erodes at 1 %; metamorphic forms at 1.5 % and erodes at 1 %; sedimentary forms at 3 % and erodes at 1 %. Assuming these rates are constant, what proportion of the total rock mass is sedimentary after 5 million years?
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About This Question
This is Gce Model Questions Vol1 2020 Geography Question 47. It is one of the objective questions from the 2020 Gce Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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