Beam log cutting

Is it possible to cut a beam with a square cross-section with a side length of 30 cm from a log with a diameter of 42 cm? Write the answer as follows: yes, because. ... no, because...

Result

x=

Yes

No

Step-by-step explanation:

$$\begin{gathered} D=42\text{cm} \\ a=30\text{cm} \\ u=D=42\text{cm} \\ u=\sqrt{2}\cdot b \\ b=u/\sqrt{2}=42/\sqrt{2}=21\sqrt{2}\text{cm}\doteq 29.6985\text{cm} \\ a>b \\ x=0 \end{gathered}$$

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