Question

The dimensions of the room are 5m X 4m X3m. Find the cost of painting the

walls of the room and the ceiling @ Rs. 50 per m2​

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

Length of the room = 5m

Breadth of the room = 4m

Height of the room  = 3m

painting the four  walls and the ceiling

area to be painted = area of cuboid - area of base

                                = 2( lb x bh x lh ) -  l x b

                                = 2(lb) + 2(bh) + 2(lh) -lb

                                =  lb + 2(bh) + 2(lh)

                                =  [(5*4) + 2(4*3) + 2(5*3)] m sq

                               =  ( 20 +24 + 30 ) m sq

                               =  74m square

cost of painting 1 m sq = Rs 50

cost of painting 74 m sq = Rs 50*74

                                        = Rs  3700

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