Neco Model Questions Vol1 2020 Geography Question 4
Practice objective / multiple choice question 4 from the 2020 Neco Model Questions Vol1 Geography examination.
The concentration of volcanic ash at a distance \(d\) km from the vent is given by \(C = \frac{8000}{d^{2}}\) kg·km⁻². Health guidelines consider concentrations above \(2\) kg·km⁻² hazardous. (a) Determine the minimum distance from the volcano at which the ash concentration falls below the hazardous level. (b) If a town is located \(30\) km downwind, calculate the ash concentration there and state by what percentage it exceeds the hazardous limit.
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About This Question
This is Neco Model Questions Vol1 2020 Geography Question 4. It is one of the objective questions from the 2020 Neco Model Questions Vol1 Geography examination.
Difficulty level: Hard .
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