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In the year $2005$, the cost of a shell and tube heat exchanger with $68\:m^{2}$ heat transfer area was $Rs.\:12.6$ Lakh. Chemical Engineering Index for cost in $2005$ was $509.4$ and now the index is $575.4$. Based on index of $0.6$ for capacity scaling, the present cost (in Lakhs of rupees) of a similar heat exchanger having $100\:m^{2}$ heat transfer area is estimated to be

  1. $17.94$
  2. $19.94$
  3. $20.94$
  4. $22.94$
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