hitunglah daerah yg diarsirr pliss tlng di jwb ya kaa buat bsk soal yaaa pliss

[tex]k \: = (\frac{1}{4} \times2 \times\pi \times r ) + 2r\\ k \: = ( \frac{1}{4} \times 2 \times 3.14 \times 10) + 2(10) \\ k \: = (5 \times 3.14) + 20 \\ k \: = 15.7 + 20 = 35.7 \: cm[/tex]