Neco 2019 Geography Question 19

A farmer cultivates 8\,ha of maize. Expected yield is 5\,tonnes\,ha^{-1}. The crop requires 550\,mm of water over the growing season. The farmer has a reservoir covering 0.6\,ha with a water depth of 2.5\,m. Evaporation from the reservoir is 5\,mm per day for 120\,days. Groundwater can be pumped at a cost of \(\text{₦}0.45\) per\,m^{3}; irrigation from the reservoir (excluding evaporation loss) is free. The market price of maize is \(\text{₦}1,200\) per tonne and the production cost (excluding water) is \(\text{₦}300\) per tonne.\n\nDetermine whether the reservoir alone can meet the water requirement after accounting for evaporation loss. If not, calculate the additional volume of water that must be pumped (in m^{3}) and compute the net profit (revenue minus production cost and pumping cost), rounded to the nearest Naira.