1. $$\frac{{\pi {{\text{d}}^2}}}{4}$$
  2. $$\frac{{\pi {{\text{d}}^2}}}{{16}}$$
  3. $$\frac{{\pi {{\text{d}}^3}}}{{16}}$$
  4. $$\frac{{\pi {{\text{d}}^3}}}{{32}}$$
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1 Answers

Answer: Option 4

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