A classroom is 7m long, 6.5m …
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Gaurav Seth 4 years, 2 months ago
l = 7m, n = 6.5m and h = 4m
∴ Area of the room = 2( l + b)h = 2(7 + 6.5) 4 = 108m2
Area of door = 3 × 1.4 = 4.2m2
Area of one window = 3 × 2 = 6m2
∴ Area of 3 windows = 3 × 2 = 6m2
∴ Area of the walls of the room to be colour washed = 108 - (4.2 + 6)
= 108 - 10.2 = 97.8m2
∴ Cost of colour washing @ Rs. 3.5 per square metre = 97.8 × 3.5 = Rs. 342.3
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