Waec Model Questions Vol1 2017 Geography Question 9

A region is divided into three zones with the data below: | Zone | Area (km²) | Rainfall (mm) | Temp (°C) | Population | |------|------------|---------------|----------|------------| | Coastal | 1 200 | 1 800 | 27 | 600 000 | | Inland plateau | 2 800 | 1 200 | 22 | 1 200 000 | | Highland | 1 000 | 800 | 15 | 200 000 | The region's total GDP is ₦9.6 trillion, allocated as 40 % agriculture, 35 % industry and 25 % services. Assume: - Agricultural output ∝ rainfall × area, - Industrial output ∝ population × (30 - temperature), - Services output ∝ population × (rainfall/100). Using these proportionalities, determine which zone contributes the greatest share of the region's GDP and state its contribution (in trillion Naira, rounded to two decimal places).