Neco 2020 Geography Question 49

Practice objective / multiple choice question 49 from the 2020 Neco Geography examination.

Neco 2020 Geography Objective / Multiple Choice Medium Difficulty
Question 49 NECO • 2020 • GEOGRAPHY • objective

A river originates at an elevation of 1500 m on a plateau and reaches a plain at an elevation of 200 m after travelling a straight‑line horizontal distance of 80 km. (a) Calculate the average gradient of the river expressed as a percentage. (b) Classify the river stage as youthful (gradient < 0.5 %), mature (0.5 % - 2 %) or old (> 2 %). (c) The river includes a waterfall that drops 50 m within a 2 km stretch. Determine the local gradient at the waterfall and comment on its effect on the river's overall character.

Answer Options

A. Average gradient = 1.625%; river is youthful. Waterfall gradient = 2.5%, a locally steep (youthful) feature.
B. Average gradient = 2.0%; river is old. Waterfall gradient = 3.0%, a locally very steep (youthful) feature.
Correct Answer C. Average gradient = 1.625%; river is mature. Waterfall gradient = 2.5%, a locally steep (youthful) feature.
D. Average gradient = 1.875%; river is mature. Waterfall gradient = 2.0%, a locally moderate (mature) feature.
Correct Answer
C
Correct Option:
Average gradient = 1.625%; river is mature. Waterfall gradient = 2.5%, a locally steep (youthful) feature.

About This Question

This is Neco 2020 Geography Question 49. It is one of the objective questions from the 2020 Neco Geography examination.

Difficulty level: Medium .

View More Neco 2020 Geography Questions More Neco Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support