$d=2r=14\text{cm}$  

$r=7\text{cm}$  

 

$P=\pi r^2=\pi \cdot {\left(7\text{cm}\right)}^2=\pi \cdot 49{\text{cm}}^2=\underline{\underline{49\pi {\text{cm}}^2}}$   

$l=2\pi r=2\pi \cdot 7\text{cm}=\underline{\underline{14\pi \text{cm}}}$