Tolong jawab nomor 27 smp 30 beserta caranya, jangan asal

27. v. kubus = r'3 = 10'3 = 1000 cm'3
v. tabung = pi * r * r * t = 3,14 * 5 * 5 * 12 = 942 cm'3 => v. gabungan = 1000 + 942 = 1.942 cm'3

28. v. A : v. B = r'3 : r'3 = p'3 : (4p) '3 =>
1p'3 : 64p'3 = 1 : 64

29. v. bak mandi = r'3 = 50'3 = 125.000 cm'3 = 125 dm'3
v. ember = 25 dm'3
banyak = 125/25 = 5 kali

30. v. A : v. B = 1 : 36
r. A : r. B = √v/(pi*t) : √v/(pi*t)=>√ 1/(pi*t) : √36/(pi*t) = 1 : 6