On the bed

We want to plant several rows of cauliflower seedlings alternating with several rows of lettuce seedlings on a bed. The cauliflower seedlings are planted 45 cm apart, and the lettuce seedlings 25 cm apart. Planting of both types starts from one edge of the rows and must finish exactly at the other edge. Determine the shortest possible length of the rows.

Thank you.

Final Answer:

x =  225 cm

Step-by-step explanation:

$$\begin{gathered} 45=3^2\cdot 5 \\ 25=5^2 \\ LCM(45,25)=3^2\cdot 5^2=225 \\ x=LCM(45,25)=225\text{cm} \end{gathered}$$

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