Pls solve this.wrong ans~~ report

1.	Pls solve this.wrong ans~~ report
Answer» ANSWER: $perimeter \: of \: circle \: is \: = 2 \times \pi \times r = 178cm$ $2 \times \frac{22}{7} \times x = 178$ $\frac{44}{7}x = 178$ $x = 178 \times \frac{7}{44}$ $x = 28.3181cm$ $area \: of \: circle \: is \: = \pi \times {r}^{2}$ $\frac{22}{7} \times 28.3181 \times 28.3181$ $2519.29 {cm}^{2}$ $perimeter \: of \: semicircle \: is \: = \frac{2\pi r}{2} + d = \pi r + d$ $\frac{22}{7} \times 28.3181 + 56.6362$ $22 \times 4.04 + 56.6362$ $88.88 + 56.6362$ $145.5162cm$ $area \: of \: semicircle \: is \: = \frac{\pi {r}^{2}}{2}$ $\frac{2519.29}{2}$ $1259.649 {cm}^{2}$

Answer»

$perimeter \: of \: circle \: is \: = 2 \times \pi \times r = 178cm$