Tolong kk bantu jaawab

jawb
r = 5 , d = 10, k = 10π , K/d=  22/7  = 3,14
r= 7,  d = 14 , k= 14π, K/d = 22/7 = 3,14
r= 11, d = 22 , k = 22π , K/d = 22/7 = 3,14
r = 16, d=32 , k = 32 π, K/d = 22/7 = 3,14
r = 21 , d = 42 , k = 42 π ,K/d = 22/7,= 3,14