Fence boards

The fence around the garden is made of rhombus-shaped laths with a side 30 cm long and 1.6 m high. How many square meters of boards are needed to make a fence of 300 laths?

Final Answer:

x =  144 m²

Step-by-step explanation:

$$\begin{gathered} a=30/100=\frac{3}{10}=0.3{\text{m}}^2 \\ h=1.6\text{m} \\ {S}_1=a\cdot h=0.3\cdot 1.6=\frac{12}{25}=0.48{\text{m}}^2 \\ x=300\cdot S_1=300\cdot 0.48=144{\text{m}}^2 \end{gathered}$$

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