V = π · r² · h [tex]\bold{r=\dfrac{d}{2}}[/tex]
8. Answer: d) 45 cm³
d = 4 --> r = 2 and h = 3.6
V = π · (2)² · (3.6)
= 14.4 π
≈ 45
9. Answer: b) 115 cm³
r = 2.7 and h = 5
V = π · (2.7)² · (5)
= 36.45 π
≈ 115
10. Answer: a) 116 cm³
r = 3 and h = 4.1
V = π · (3)² · (4.1)
= 36.9 π
≈ 116
11. Answer: c) 106 cm³
d = 8.2 --> r = 4.1 and h = 2
V = π · (4.1)² · (2)
= 33.62 π
≈ 106
