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A room is 3.8m long and 3.5m wide.The walls of the room are 2.5m high. The door is 12.85 by 2.2 and the window is 1.6m. A calculate the area of the ceiling. B calculate the total area of the wall in the room. C The walls and ceiling have to be painted. If 1 tin can cover 12m², how many tins of paint will be required​