Correct Answer - Option 2 : Rs. 82,200

**Explanation:**

Total wall area \(= \left[ {\begin{array}{*{20}{c}} {\left( {3 \times 3} \right) \times 2 + \left( {4 \times 3} \right) \times 2}\\ \downarrow \\ {Room\;\left( 1 \right)} \end{array}} \right] + \left[ {\begin{array}{*{20}{c}} {\left( {4 \times 3} \right) \times 2 + 5 \times 3 \times 2}\\ \downarrow \\ {Room\;\left( 2 \right)} \end{array}} \right]\)

Total wall area = 96 m^{2}

Total door area = 2 × 1.2 × 2 = 4.8 m^{2}

Total window area = 4 × 1.5 × 1.5 = 9 m^{2}

Area over which plastering to be done wall area – opening area

Cost of plastering of 1 sq.m is = Rs. 1000

**∴ Total cost = Rs. 1000 × 82.2 = 82200 /-**