The internal measures of a cuboid room are 13m X 9m X 5m. Find the total costof white washing all four walls of a room, if the cost of while washing is Rs.4 per
m2. What will be the cost of white washing if the ceiling of the room is also
white washed.
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Answer:
Formula - 2h(l + b)
2 x 5(13 + 9)
1O x 22
= 22Om²
Ceiling dimensions - 13m x 9m
Formula - l x b
13 x 9
= 117 m²
Four walls + ceiling - 117m² + 22Om²
= 337m²
Cost - ₹4 \ m²
337 x 4 = ₹1348 ( Ans )
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