Answer:
20. 300π m³
21. 457 1/3 π cm³
Explanation:
20. r = 10 ÷ 2 = 5
V = 5² × 12 × π = 25 × 12π=300π m³
21. r = 14 ÷ 2 = 7
V = \frac{4}{3} \pi 7x^{3}
V = 457 1/3 π cm³
6785.84 m3
Volume = height * radius squared * pi
Volume = 15 * 12^2 * 3.14
Volume is approximately 6785.84
Answer may vary due to the approximate value of pi
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