13. Perhatikan kembali gambar pada Soal nomor 12.
a. Tentukan perbandingan volume A dengan volume B.
Jawab: (VA)/(VB) = (1/3π.(4r²).4x - 1/3π.(3r²).3x) / ((1/3π.(3r²).3x - 1/3π.(2r²).2x)
= (1/3π.16r².4x - 1/3π.9r².3x) / ((1/3π.9r².3x - 1/3π.4r².2x)
= (1/3π.r²x (64-27)) / 1/3π.r²x (27-8)
= 37/19
Volume A : Volume B = 37 : 19
b. Tentukan perbandingan volume B dengan volume C.
Jawab: (VB)/(VC) = (1/3π.(3r²).3x - 1/3π.(2r²).2x) / ((1/3π.(2r²).2x - 1/3π.r².x)
= (1/3π.9r².3x - 1/3π.4r².2x) / ((1/3π.4r².2x - 1/3π.r².x)