Waec Model Questions Vol1 2021 Geography Question 18
Practice objective / multiple choice question 18 from the 2021 Waec Model Questions Vol1 Geography examination.
A river has eroded a canyon to a depth of 250 m over 5 million years. During the first 2 million years the average erosion rate was 30% higher than during the later period. Assuming a constant rate within each period, what was the average erosion rate (in mm per year) during the later period?
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About This Question
This is Waec Model Questions Vol1 2021 Geography Question 18. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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