Dedicated 62673

The street lamp is 5.5 m high. It suddenly stopped shining. How long do ladders need workers if they know that dedicated lamps can be placed at a distance of 18 dm at the bottom?

Correct answer:

c =  5.7871 m

Step-by-step explanation:

$$\begin{gathered} a=5.5\text{m} \\ b=18\text{dm}\to \text{m}=18:10\text{m}=1.8\text{m} \\ {c}^2=a^2+b^2 \\ c=\sqrt{a^2+b^2}=\sqrt{5.5^2+1.8^2}=5.7871\text{m} \end{gathered}$$

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