the length, breadth and height of a room are 6cm,4.5m and 3m respectively,find the cost of white washing the walls of the room and the ceiling at the rate of rs 5 per m2
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Length = 6m
Breadth = 4.5m
Height = 3m
Area to be white washed
= Area of walls + Area of Ceiling
= 2h(l+b) +lb = 2×3(6+4.5) + 6×4.5
= 63 + 27 = 90m²
1m² -------> ₹5
90m² -----> 5×90 = ₹450
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