V = 2 x V kerucut + V tabung
V = 2 x ⅓ πr²t + πr²t
V = ⅔ πr²t + πr²t = 5/3 πr²t
c. L = L selimut kerucut + L ½ bola
L = πrs + 2πr²
L = πr (s + r)
V = V kerucut + V bola
V = ⅓ πr²t + 4/3 πr³
V = πr² (⅓ t + 4/3 r)
d. L = L lingkaran + L selimut tabung + L ½ bola
L = πr² + 2πrt + 2πr²
L = πr (r + 2t + 2r) = πr (3r + 2t)
V = V tabung + V ½ bola
V = πr²t + ½ 4/3 πr³
V = πr²t + 4/6 πr³ = πr² (t + 4/6 r)
e. L = L selimut kerucut + L selimut tabung + L ½ bola
L = πrs + 2πrt + 2πr²
L = πr (s + 2t + 2r)
V = V kerucut + V tabung + V ½ bola
V = ⅓ πr²t + πr²t + ½ 4/3 πr³
V = ⅓ πr²t + πr²t + 4/6 πr³
V = πr² (⅓ t + t + 4/6 r)
V = πr² (4/3 t + 4/6 r)
f. L = L selimut tabung + 2 x L ½ bola
L = 2πrt + 2 x 2πr²
L = 2πrt + 4πr²
L = 2πr (t + 2r)