the walls and ceiling of a room are to be plastered the Length, breadth and height of the room are 4.5m,3 m and 350 CM, respectively. find the cost of plastering the room at the rate of rupees 12 per metre square
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Answers & Comments
let the breadth of the room be b=3 m.
let the height of the room be h=350 cm=3.5m
area of the four walls =2lh+2bh=
area of the ceiling = lb=4.5×3=13.5 metre square
Answer:
Answer is Rs 528
Step-by-step explanation:
length = 4.5 m
breadth= 3 m
height= 350 cm = 350/100 = 3.5 m
Area of walls = 2( l+ b) h
= 2( 4.5 + 3 ) 3.5
= 52.5 m ^2
Area of ceiling = l × b
= 4.5 × 3 = 13.5 m^2
Area of room = 52.5 + 13.5
= 66m^2
Cost of plastering = 66 × 12
= Rs 792