Round table tablecloth

The round table has an area of 50.24 dm². Calculate the circular tablecloth diameter, if it extends beyond the edge of the table by 30 cm.

Correct answer:

D =  139.9797 cm

Step-by-step explanation:

$D=2\cdot (\sqrt{5024\mathrm{/}\pi }+30)=139.9797\text{ cm}$

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