Find out the cost of painting a 16 m long square room at the rate of Rs. 5.50 per square meter. Statements: (I) The width of the room is 15 m. (II) The height of the room is 12 m. (III) The total area of the door and window is 60 m².

The room is 16m long (given in question). To paint walls, we need the total wall area minus door/window area. Statement I gives width = 15m, so floor area = 16 × 15. Statement II gives height = 12m, so wall area = perimeter × height = 2(16 + 15) × 12 = 744 m². Statement III gives door/window area = 60 m² to be subtracted. Paintable area = 744 - 60 = 684 m². Cost = 684 × 5.50 = Rs. 3762. All three statements are necessary.