1. $$\frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$
  2. $$1.875 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$
  3. $$2 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$
  4. $$3 \times \frac{\pi }{4}{{\text{d}}^2} \times \tau \times {\text{n}}$$
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1 Answers

Answer: Option 2

Let'

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