diameter=... jari jari=... phi= 22/7 volume bola= 38.808 cm^3

Mapel : Matematika
Bab : Bangun Ruang Sisi Lengkung

      Volume = 4/3 x π x r³
38.808 cm³ = 4/3 x 22/7 x r³
38.808 cm³ = 88/21 x r³
               r³  = 38.808 x 21/88
               r³  = 9.261
                r  = ∛9.261
                r  = 21 cm

d = 2 x r
   = 2 x 21 cm
   = 42 cm

v = 4/3 π r³
38.808 = 4/3 × 22/7 × r³
814.968 = 88r³
r³ = 9.261
r = 21 cm

d = 2r
d = 2 × 21
d = 42 cm