Waec Model Questions Vol1 2019 Geography Question 18

Practice objective / multiple choice question 18 from the 2019 Waec Model Questions Vol1 Geography examination.

Waec Model Questions Vol1 2019 Geography Objective / Multiple Choice Medium Difficulty
Question 18 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • GEOGRAPHY • objective

A region receives an average annual rainfall of 1200 mm and has an average temperature of 27°C. The vegetation is tropical rainforest. Net primary productivity (NPP) can be estimated by NPP (g C m⁻² yr⁻¹) = 0.5 × (Annual Rainfall in mm) - 20 × (Mean Temperature in °C). (a) Compute the NPP for the region. (b) If 15% of the region is cleared for agriculture, reducing the NPP of that portion by 80%, what is the overall reduction in total NPP expressed as a percentage of the original total NPP?

Answer Options

A. 55 g C m⁻² yr⁻¹; 10% reduction
Correct Answer B. 60 g C m⁻² yr⁻¹; 12% reduction
C. 70 g C m⁻² yr⁻¹; 15% reduction
D. 48 g C m⁻² yr⁻¹; 8% reduction
Correct Answer
B
Correct Option:
60 g C m⁻² yr⁻¹; 12% reduction

About This Question

This is Waec Model Questions Vol1 2019 Geography Question 18. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Geography examination.

Difficulty level: Medium .

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