Nitric lime nitrogen

Nitric lime contains an average of 19% nitrogen and 55% calcium oxide. How many grams of nitrogen per 1 m² if we bought a 25 kg package and thereby evenly fertilized a garden of 12 a?

Final Answer:

D =  3.9583 g/m²

Step-by-step explanation:

$$\begin{gathered} m=25\text{kg}\to \text{g}=25\cdot 1000\text{g}=25000\text{g} \\ S=12\text{a}\to {\text{m}}^2=12\cdot 100{\text{m}}^2=1200{\text{m}}^2 \\ r=19\%=\frac{19}{100}=0.19 \\ d=r\cdot m=0.19\cdot 25000=4750\text{g} \\ D=d/S=4750/1200=3.9583{\text{g/m}}^2 \end{gathered}$$

Try another example