Volume kerucut yg panjang diameternya 28 cm dan tingginya 25 cm adalah A. 16.632 cm3 B. 8.316 cm3 C. 5.544 cm3 D. 5.458 cm3

V = TL(phi) x jari² x jari² x tinggi x 1/3
= 22/7 x 14cm x 14cm x 25cm x 1/3
= 22 x 2(14 : 7) x 14cm x 25 x 1/3
= 44cm x 14cm x 25cm x 1/3
= 616cm x 25cm x 1/3
= 15.400cm x 1/3
= 5.133cm³

Kelas 9 Matematika
Bab 2 - Bangun Ruang Sisi Lengkung

Kerucut
d = 28 cm
r = 14 cm
t = 25 cm

V = 1/3 × πr²t
V = 1/3× 22/7 × 14 cm × 14 cm × 25 cm
V = 1/3 × 22 × 2 cm × 14 cm × 25 cm
V = 5.133 cm³