Question

The length breadth and height of a room are 5m,4m,3m respectively.find the cost of white washing the inner of the room and celling at the rate of 50 per square metre.

Answer 1

Answer:

Step-by-step explanation:

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 ceiling = l*b

                        = 5 * 4  

                       = 20 sq. m

total area= area of ceiling + area of ceiling  

              = 54 + 20 sq. m

              = 74 sq. m

cost of white washing for 1 sq. m = rs 50

            so for 74 sq. m = 50 * 74 sq. m

                                       = rs 3700