11. Perhatikan gambar berikut!

Diket :

• d = 28 cm

• r = 14 cm

• T kerucut = 18 cm

• T tabung = 54 cm – 18 cm

= 36 cm

• π = 22/7

Dit :

• V gab.

• V gab. = V tabung + V kerucut

• V gab. = π × r² × t + ⅓ × π × r² × t

• V gab. = (22/7) × 14 × 14 × 36 + ⅓ × (22/7) × 14 × 14 × 18

• V gab. = 22 × 2 × 14 × 36 + 22 × 2 × 14 × 6

• V gab. = 22.176 + 3.696

• V gab. = 25.872 cm³