Question

Tolong jawab pertanyaan yang ada digambar ini. "yang C aja .

Answer 1

Diameter awal = 4,2 cm
diameter akhir = 2,5 cm

perubahan volume
= volume awal - volume akhir
= 4/3.π.r³ - 4/3. π.r³
= 4/3 . π (r³ - r³)
= 4/3 . 3,14 (2,1³ - 1,25³)
= 11,921 cm³

Answer 2

D1= 4,2 m, r1 = 2,1 m
d2 = 2,5 m , r2 = 1,25 m

C) ΔV = V1 - V2
ΔV = 4/3 π( r₁³ - r₂³)
ΔV = 4/3 π (2,1³ - 1,25³) 
ΔV = 4/3 π (9,261 - 1,953)
ΔV = 4/3π(7,308)
ΔV = 9,744 π