bantu jawab no.2&3 ya

2.
Volume Air dan Bola Besi = Volume Air + Volume Besi

πr²t2 = πr²t1 + 4/3πr³
100t2 = 100 × 40 + 4/3 × 125
100t2 = 4.000 + 500/3
100t2 = 12.500/3
t2 = 125/3
t2 = 41⅔ cm
Tinggi air sekarang = 41⅔ cm

3.
πr²t : ⅓πr²t
5² × 30 : ⅓ × 5² × 30
25 × 30 : ⅓ × 25 × 30
750 : 250
3 : 1

Maaf Kalau Salah

2][
Volume bola = volume air naik
4/3 πr³ = π . rtab² . t
4/3 . 5³ = 10² . t
t = 4/3 . 125/100
t = 5/3 cm

tinggi air sekarang
= 40 + 5/3
= 41 2/3 cm
= 41,667 cm ✔

3][
Perbandingan volume tabung dan kerucut
Vtab : Vkerct = πr²t : 1/3 πr²t = 1 : 1/3 = 3 : 1