gemar matematika 6 hal 61-62 pls...

klo yg ditanyakan volumenya maka
5. V = 1/2 × 6 × 8 × 18 = 432
6. v = 3×3×8. + 1/2 × 2×3×8 = 96
7. v = 6×5×4. + 1/2 × 3×5×6 = 165