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V tabung = (phi . r^2) . t
= (22/7 . 14^2) . 45
= (22/7 . 196) . 45
= 27720 cm3
d = 28 cm
t = 45 cm
r = 28 : 2 = 14 cm
Dit : V
Peny :
V = π r² . t
= x 14² x 45
= x 196 x 45
= 616 x 45
= 27720 cm³