a door frame of dimension 3m×2m is fixed on the wall of dimension 15m×10m .Find the total labour charges for painting the wall,if the labour charge for painting 1m^2 of wall is Rs 2.50
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Answered by
18
Surface Area of wall = Length× breadth
= 15 × 10
=150 m^2
Surface Area of Door Frame = length× breadth
= 3 ×2
= 6 m^2
Now the area remained to be painted = Area of the wall - area of the door
= 150 - 6
=144 m^2
Cost of Painting 1 m^2 = ₹2.50
Cost of painting 144 m^2 = ₹2.50×144
=₹360
Answered by
17
SOLUTION :
Area of door = Length × Breadth
= L × B
= 3 m × 2 m
= 6 m^2
Area of wall including door = Length × Breadth
= L × B
= 10 m × 10 m
= 100 m^2
Area of wall excluding door = 100 - 6
= 94 m^2
Total labour charges for painting the wall is
= 2.50 × 94
= Rs. 235
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