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For this we will find curved surface area of room + area of cieling
= 2h(L+b) + L*B
= 2*5 (8+10) + 10*8
= 10*18 + 80
=180 + 80
= 260 m² ans
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Step-by-step explanation:
We have,
Dimensions of the room= 10m×8m×5m
Surface area of the walls and the ceiling
= 2(10+8)×5 + 10×8
= 10×18 + 80
= 260m^2
Therefore, the cost of colouring the walls and ceiling at the rate of Rs. 36 per sq. metre
= Rs. 36 × 260
= Rs. 9360
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