1. $$\frac{{2{\text{W}}{{\text{C}}_{\text{E}}}}}{{{{\text{C}}_{\text{S}}}}}$$
  2. $$\frac{{{\text{W}}{{\text{C}}_{\text{E}}}}}{{{\text{2}}{{\text{C}}_{\text{S}}}}}$$
  3. $$\frac{{{\text{W}}{{\text{C}}_{\text{E}}}}}{{{{\text{C}}_{\text{S}}}}}$$
  4. $$\frac{{{\text{W}}{{\text{C}}_{\text{E}}}}}{{{\text{2}}{{\text{C}}_{\text{S}}}}}$$
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1 Answers

Answer: Option 2

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