tolong banget pake rumus ya bro/sis

Diketahui :
- Tinggi Air = 30 cm
- Diameter Tabung = 28 cm
- Jari - Jari Tabung = ½ × 28 cm = 14 cm
- Jari - Jari Bola = 7 cm

Ditanya :
- Tinggi Air Setelah 6 Bola Dimasukkan = ....?

Penyelesaian :
- Volume Air :
V = π × r × r × t
V = 22/7 × 14 × 14 × 30
V = 22 × 2 × 420
V = 44 × 420
V = 18.480 cm³

- Volume 6 Bola :
V = 6 × 4/3 × π × r × r × r
V = 2 × 4 × 22/7 × 7 × 7 × 7
V = 8 × 22 × 7 × 7
V = 176 × 49
V = 8.624 cm³

- Volume Tabung + Volume 6 Bola :
V = 18.480 cm³ + 8.624 cm³
V = 27.104 cm³

- Tinggi Air Setelah 6 Bola Dimasukkan :
V = π × r × r × t
27.104 = 22/7 × 14 × 14 × t
27.104 = 22 × 2 × 14t
27.104 = 44 × 14t
27.104 = 616t
t = 27.104 ÷ 616
t = 44 cm

Jawaban : C. 44 cm

Maaf Kalau Salah