Neco 2023 Geography Question 8

Practice objective / multiple choice question 8 from the 2023 Neco Geography examination.

Neco 2023 Geography Objective / Multiple Choice Medium Difficulty
Question 8 NECO • 2023 • GEOGRAPHY • objective

A river is 120 km long and drops 600 m from source to mouth. Its average discharge is 150 m\(^3\) s\(^{-1}\). The channel can be approximated as a rectangular cross‑section 30 m wide and 3 m deep. Using Manning's equation with roughness coefficient \(n=0.035\), determine the average slope, classify the river stage (youthful, mature or old) based on the slope, and estimate the travel time of a water particle from source to mouth.

Answer Options

A. Average slope = 0.003 (0.3 %); river is old; travel time ≈ 12 hours
Correct Answer B. Average slope = 0.005 (0.5 %); river is mature; travel time ≈ 9 hours
C. Average slope = 0.010 (1.0 %); river is youthful; travel time ≈ 5 hours
D. Average slope = 0.008 (0.8 %); river is youthful; travel time ≈ 6 hours
Correct Answer
B
Correct Option:
Average slope = 0.005 (0.5 %); river is mature; travel time ≈ 9 hours

About This Question

This is Neco 2023 Geography Question 8. It is one of the objective questions from the 2023 Neco Geography examination.

Difficulty level: Medium .

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