Neco Model Questions Vol1 2025 Geography Question 12
Practice objective / multiple choice question 12 from the 2025 Neco Model Questions Vol1 Geography examination.
A river descends from its source at an elevation of 1500 m to sea level. In its upper course the gradient is \(30\ \text{m\ km}^{-1}\) for the first 20 km. In the middle course the gradient reduces to \(5\ \text{m\ km}^{-1}\) until the cumulative drop reaches 1200 m above sea level. The remaining descent to sea level occurs in the lower course with a gradient of \(1\ \text{m\ km}^{-1}\). What is the total length of the river (in km)?
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About This Question
This is Neco Model Questions Vol1 2025 Geography Question 12. It is one of the objective questions from the 2025 Neco Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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