sebuah tabung berdiameter alas 20 cm dan tingginya 12 cm .hitunglah volume tabung tsb

V.tabung
= luas alas × t
= phi × r × r × t
= 3.14 × 10 × 10 × 12

= 3768 cm^2

diket tabung
             d = 20 cm
             t = 12
 ditanya : volume tabung
jawab
  r = 1/2.d = 1/2.20 = 10
volume tabung = πr²t
                         = 3,14 X 10 X 10 X 12
                         = 314 x 12
                         = 3.768 cm³