A room is 9m by 8m by 6.5m.It has one door of dimensions (2m×1.5m) and four windows each of dimensions (1.5m×1m).Find the cost of painting the walls at Rs.50/m2.
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Total cost of painting = Rs.10,600
Given:
Dimensions of wall = 9m × 8m × 6.5m
Dimensions of Door = 2m × 1.5m
Dimensions of windows = 1.5m × 1m
Cost of painting = Rs.50/m²
Computation:
Area of four side of wall = 2h(l + b)
Area of four side of wall = 2 × 6.5 (9 + 8)
Area of four side of wall = 13 (17)
Area of four side of wall = 221 m²
Area of one door = l × b
Area of one door = 2m × 1.5m
Area of one door = 3 m²
Area of 4 window = 4 × 1.5m × 1m
Area of 4 window = 6 m²
Total painting area = Area of four side of wall - Area of one door - Area of 4 window
Total painting area = 221 m² - 3 m² - 6 m²
Total painting area = 212 m²
Total cost of painting = Total painting area × Cost of painting
Total cost of painting = 212 m² × 50/m²
Total cost of painting = Rs.10,600
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