The lenght,breadth,and height of a room is 5m,4m,and 3m respectively. find the cost of white washing the walls of the room and the ceiling at the rate of rs.12 per m²
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Length, breadth and height of a room are 5 m, 4 m and 3 m.
Area of four walls of the room =2h(l+b)
=2×3(5+4)
=6(9)
=54 sq m
Area of the ceiling =l×b
=5×4
=20 sq cm.
Total area of the four walls and the ceiling of the room
=54+20
=74 sq cm
Cost of white washing=Rs.12 per m²
Total cost of white washing=74×12
=Rs.888
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