The walls, floor and roof of a room are to be plastered. If the length, breadth and
height of the room are 4.5 m, 3 m and 3.5 m respectively then calculate the
area to be plastered ?
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Answer:
The area to be plastered is 63.75 m^2.
Step-by-step explanation:
The room represents a cuboid.
l = 4.5m
b = 3.5 m
h = 3m
In a room, only the walls and the ceiling will be plastered and not the floor.
Thus, the surface area of the room to be plastered is,
= 2(bh+lh) + lb
= 2 [ (3.5×3) + (4.5×3) ] + (3.5×4.5)
= 2 [ 10.5+13.5 ] + 15.75
= 2(24) +15.75
= 48 + 15.75
= 63.75 m^2
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