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The length,breadth and height of a room are 5 m ,4mand 3m respectively
?
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The length,breadth and height of a room are 5 m ,4mand 3m respectively...
Given that,
length = 5 m 
breadth = 4 m 
height = 3 m 
area of wall = 2h (L+  b)
                     = 2 * 3 (4 +5 )
                     = 6*9
                     = 54 sq m
area of cieling = l*b
                         = 5 * 4 
                        = 20 sq m
total area= area of cieling + area of cieling 
               = 54 + 20 sq m
               = 74 sq m
cost of white washinf for 1 sq m = rs 50
             so for 74 sq m = 50 * 74 sq m
                                        = rs 3700
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