WAEC Agriculture 2011 Paper

Concept:Number of seedlings required equals the total farmland area divided by the area occupied by one seedling.Explanation:Find the area occupied by one seedling using the spacing $2.5\text{ m}$ by $4.0\text{ m}$.Area per seedling:$$2.5 \times 4.0 = 10\text{ m}^2$$Convert the farmland area to square metres.Since $1$ hectare $= 10{,}000\text{ m}^2$, a $2$ hectare farmland is:$$2 \times 10{,}000 = 20{,}000\text{ m}^2$$Now divide the total area by the area per seedling:$$\frac{20{,}000}{10} = 2{,}000$$So, the number of seedlings required is $2{,}000$.Answer:$2{,}000$ seedlings (Option B).