Gardening - beet

The father wants to plant beet in spring. He bought at the garden centre a package containing 3 g of seeds. On the back of the package it is stated that for sowing 10 m² of flower bed, 15 g of seed is recommended. The father wants to sow the entire purchased package on a rectangular bed with one side length of 0.8 m and to observe the recommendation from the package.

Calculate in metres what minimum length of the other side of the bed the father must choose.

Final Answer:

b =  2.5 m

Step-by-step explanation:

$$\begin{gathered} m_1=3\text{g} \\ {m}_2=15\text{g} \\ S=10\cdot \frac{m_1}{m_2}=10\cdot \frac{3}{15}=\frac{10\cdot 3}{15}=\frac{30}{15}=2{\text{m}}^2 \\ a=0.8\text{m} \\ S=ab \\ b=S/a=2/0.8=2.5\text{m} \end{gathered}$$

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