tolong dijawab ya........

L     = π×r²                         K= 2×(P+L)                  K=π × d
616 =22/7×r²                        =2×(24+18)                  =22/7×14
r²     = 616 ÷ 22/7                 =2×42                           =44cm
r²     = 616×7/22                   = 84 cm
r²     =√196
r      =14 cm
maaf bila salah