hitunglah volume bangun bangun berikut.

11.
v = πr²t
v = 22/7 x 7² x 10
v = 22/7 x 49 x 10
v = 22 x 7 x 10
v = 1.540 dm³

12.
v = πr²t
v = 3,14 x 5² x 50
v = 3,14 x 25 x 50
v = 3.925 cm³