Cows

4 cows spent 16 bags of hay in 5 days. How many bags of hay sacks are needed for 5 cows for seven days?

Correct answer:

x =  28

Step-by-step explanation:

$$\begin{gathered} k=16\mathrm{/}(5\cdot 4)={\displaystyle \frac{4}{5}}=0.8 \\ x=k\cdot 5\cdot 7=0.8\cdot 5\cdot 7=28 \end{gathered}$$

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