The length,breadth and geisha of a cuboidal room is 12m,5m and 4m respectively.find the cost of white washing the four walls and the ceiling of the room if the cost of white washing is Rs7 for sq meter
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Answered by
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Answer:
Rs 1372
Step-by-step explanation:
Length = 12m
Breadth = 5m
Height = 4m
Area of one wall = l x h = 48m²
Area of 2 walls = 48 x 2 = 96m²
Area of 2nd wall = b x h = 20 m²
Area of 2 walls = 40m²
Area of ceiling = 12 x 5 = 60 m²
Total area to paint = 196 m²
Cost per m² = Rs 7
Total cost = 196 x 7 = Rs 1372
Answered by
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Answer:
Area required = 198 m²
Cost of white-washing = ₹ 1386
Step-by-step explanation:
l = 12m
b = 5m
h = 4m
Area required : -
LSA of cubeoid + Area of the top rectangle
2 ( bh + hl ) + lb
2 ( 5*4 + 4*12 ) + 12*5
2 ( 20 + 48 ) + 60
2 ( 68 ) + 60
136 + 60
198 m²
∴ Cost of white-washing the room = 198*7 = ₹ 1386
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