25. A door frame of dimensions 4m x 5m is fixed on the wall of dimension 11m x 11m.
Find the total labour charges for painting the wall if the labour charges for painting 1m?
of the wall is Rs 2.50.
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Answer:
Area of frame = 4×5=20m^2
Area of wall =11×11=121m^2
here we have to subtract the area of frame from area of wall to get the area of wall to be painted.
therefore,
the cost of painting = 121-20 ×2 .50
=252.5 .
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