WAEC Agriculture 2013 Paper

Concept:Crop population per hectare is calculated by dividing the total area of one hectare by the area occupied by a single crop plant.Explanation:The given crop spacing is $3.6\mathrm{m} \times 4.5\mathrm{m}$.So, the area occupied by one crop is $3.6 \times 4.5 = 16.2\mathrm{m}^2$.We know that one hectare equals $10{,}000\mathrm{m}^2$.Therefore, the number of crops per hectare is $\frac{10{,}000}{16.2} = 617.28$.Since crop population cannot be fractional, round it to the nearest whole number.Hence, the crop population per hectare is approximately $617$.Answer:B. 617