The Length, breadth and height of hall are 10 metre, 8 metre and 6 metre respectively. The hall has two doors of area 2m * 1.5 m and three windows of area 1.5m * 1 my. Find the cost of painting the walls( only the walls) at the rate of @ rupees 180 per square metre.
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csa of cuboid=2h(l+b), 2*6(10+8)=216m^2. area of two door =2(L×B)=2×2×1.5=6m^2. area of three win.=3×1.5×1=4.5m^2. 6area of only walls= csa of cuboid -(area of doors+area of Windows). area of only walls=216-(6+4.5)=216-10.5=205.5m^2. cost of painting the walls=180×205.5=36,990Rs
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