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  • Find the area of the four walls of a room whose length is 6m , breadth 5m and height 4m . Also find the cost of white washing the walls, if the rate of white washing is Rs 5 per square meter . (Doors , windows and other openings ignored).

Find the area of the four walls of a room whose length is 6m , breadth 5m and height 4m . Also find the cost of white washing the walls, if the rate of white washing is Rs 5 per square meter . (Doors , windows and other openings ignored).

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Solution: Here , l=6m b=5m and h=4m

herefore             Area of the walls =2h(l+b)=left 2 imes4 imes(6+5) ight m^2=88m^2

               cost of white washing of 1  square metre =5Rs

herefore               cost of white washing the walls = Rs(5 imes88)=Rs440

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Deependra Verma

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