Grass seed

How many kilograms of grass seed are needed to establish a lawn on a rhombus-shaped plot of land with sides 55m and 40m, if the height of the shorter side is 22m and 1kg of seed is enough for 40m square?

Correct answer:

m =  22 kg

Step-by-step explanation:

$$\begin{gathered} a=55\text{m} \\ b=40\text{m} \\ {h}_2=22\text{m} \\ \sigma =1/40=\frac{1}{40}=0.025{\text{kg/m}}^2 \\ S=b\cdot h_2=40\cdot 22=880{\text{m}}^2 \\ m=\sigma \cdot S=0.025\cdot 880=22\text{kg} \end{gathered}$$

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