Plan scale

The actual width of the room is 66 dm, the width in plan is 4.4 cm. What scale corresponds to the plan?

Result

M = (Correct answer is: 1:150)

Step-by-step explanation:

$$\begin{gathered} a_1=66\text{ dm } \\ {a}_2=4.4\text{ cm}\to \text{ dm}=4.4\mathrm{/}10\text{ dm}=0.44\text{ dm } \\ m=a_1\mathrm{/}{a}_2=66\mathrm{/}0.44=150 \\ M=1:m \\ M=1:150 \end{gathered}$$

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