Waec Model Questions Vol1 2017 Geography Question 7
Practice objective / multiple choice question 7 from the 2017 Waec Model Questions Vol1 Geography examination.
A river drops from an elevation of 1 200 m at its source to sea level over a length of 150 km. The gradient in the upper 40 km is twice that of the lower 110 km. If the average erosion rate (mm yr⁻¹) is proportional to the square of the local gradient, what is the ratio of the average erosion rate in the upper stretch to that in the lower stretch?
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About This Question
This is Waec Model Questions Vol1 2017 Geography Question 7. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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