Tinggi tabung 22cm Dan volume 847cm³ berapakah diameter alas tabung

V.tabung = 847
phi x r² x t = 847
22/7 x r² x 22 = 847
484/7 x r² = 847
r² = 847 : 484/7
r² = 847 x 7/484
r² = 12,25
r = √12,25
r = 3,5 cm
maka,
d = 2 x r = 2 x 3,5 = 7 cm