Find the area of four walls of a room whose lenght is 14m breadth is 9 m height is 10m. Also find the cost of whitewashing the wall, if the rate of whitewashing is 6.50 per m2
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Area of four walls = 2(l+b)h
= 2(14+9)10
= 2*23*10=460 m^2
Cost of whitewashing the walls= 460*6.50=2990
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