Bangun ruang di atas terdiri dari 2 bangun, yakni:

1. Tabung (bagian bawah)
2. Kerucut (bagian atas)

I. Tabung

Diameter = D = 28 cm

Jari-jari = r = $\frac{1}{2}\times$ D = $\frac{1}{2}\times28$ = 14 cm

Tinggi = t = 35 - 15 = 20 cm

Volume tabung = luas alas (lingkaran) $\times$ tinggi

= $\pi\times r^2\times t$

= $\frac{22}{7}\times14^2\times20$

= 12.320 cm³

II. Kerucut

Diameter = D = 28 cm

Jari-jari = r = $\frac{1}{2}\times$ D = $\frac{1}{2}\times28$ = 14 cm

Tinggi = t = 15 cm

Volume kerucut = $\frac{1}{3}\times$ luas alas (lingkaran) $\times$ tinggi

= $\frac{1}{3}\times\pi\times r^2\times t$

= $\frac{1}{3}\times\frac{22}{7}\times14^2\times15$

= 3.080 cm³

Volume gabungan bangun ruang = volume tabung + volume kerucut

= 12.320 + 3.080

= 15.400 cm³