Neco 2018 Geography Question 12

Practice objective / multiple choice question 12 from the 2018 Neco Geography examination.

Neco 2018 Geography Objective / Multiple Choice Medium Difficulty
Question 12 NECO • 2018 • GEOGRAPHY • objective

A river descends from an elevation of 800 m to 200 m over a total length of 150 km. The upper 60 km of the river has a gradient that is twice the gradient of the lower 90 km. Determine the average gradient (in metres per kilometre) of the upper and lower reaches respectively.

Answer Options

A. Upper gradient \(\approx 4.28\) m km\(^{-1}\); lower gradient \(\approx 2.14\) m km\(^{-1}\).
B. Upper gradient \(\approx 5.71\) m km\(^{-1}\); lower gradient \(\approx 1.43\) m km\(^{-1}\).
C. Upper gradient \(\approx 8.57\) m km\(^{-1}\); lower gradient \(\approx 2.86\) m km\(^{-1}\).
Correct Answer D. Upper gradient \(\approx 5.71\) m km\(^{-1}\); lower gradient \(\approx 2.86\) m km\(^{-1}\).
Correct Answer
D
Correct Option:
Upper gradient \(\approx 5.71\) m km\(^{-1}\); lower gradient \(\approx 2.86\) m km\(^{-1}\).

About This Question

This is Neco 2018 Geography Question 12. It is one of the objective questions from the 2018 Neco Geography examination.

Difficulty level: Medium .

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