Tolong jawab ya kak :)​

Jawaban:

diketahui K 62.8 cm

ditanya L

jawab K = 2 x phi x r

62.8 = 2 x 3.14 x r

62.8 = 6.28 r

r = 62.8 : 6.28

r = 10

L = phi x rx r

= 3.14 x 10 x 10

= 314 cm2