tolong dibantu pakai cara no 27 dan 29

27. Volume = phi . r kwadrat . t
= 22/7 . 7 . 7 .15
= 2310 ( D )
28. B. prisma segi tiga.
29. volume 1 = p . l . t
= 30 . 15. 15
= 6750
volume 2 = 1/3 . l alas. t
= 1/3 . ( 15.15 ) .15
= 1125
volume 3 = v1 + v2
= 6750 + 1125
= 7875 ( D )

{ SEMOGA BERMANFAAT }