tolong bantu ya,no 29

Keliling lingkaran = Лd
d = r x 2 = 50 cm

Keliling = 3,14 x 50
=157 cm

2 x 22/7 x 12,5 =
12,5 x 2 = 25
25 x 22/7 = 550/7
550/7 = 78,57
keliling = 78,57
maaf ya kalau salah