Question

S=?
C=9,42
S=пR2
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Answer 1

$C=9,42$

$\pi =3,14$

$S=?$

1)   $C=2\pi R$

    $R=\frac{C}{2\pi} =\frac{9,42}{2*3,14}=1,5$

    $R=1,5$

2)  $S=\pi R^2$

  $S=3,14*1,5^2=3,14*2,25=7,065$

   $S=7,065$