(2) Area of the four walls = 2h(l + b)= (2 × 4)(3 + 5) = 64 m2 ∴ There are doors and windows onthe wall, therefore, area of the wallsto be painted = Total area of walls – total area ofdoors and buildings =[64–2(3×2)–4(1×2)]m2=44m2 ∴Total cost of painting = 44 × 32= ₹ 1408