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a classroom is 6.8m long 3.5m wide and 270cm high find the cost of plastering the 4 walls and ceiling at the rate of 12per m^2
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29 votes
a classroom is 6.8m long 3.5m wide and 270cm high find the cost of plastering the 4 walls and ceiling at the rate of 12per m^2

User Tardomatic
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1 Answer

23 votes
23 votes
Area of four walls + area of ceiling = 2h(l+b) + lb
=2*2.7(6.8+3.5) +6.8*3.5
=2*2.7*10.3+ 23.8
= 55.62+23.8
=79.42
Cost of plastering =79.42*12
= 953.04
User Alfiza Malek
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2.8k points
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