The internal measures of a cuboidal room are 12 m x 8m x 4m. Find the
total cost of whitewashing all four walls of a room, if the cost of white washing
is Rs. 5 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:
1280
step by step Explanation :
Given
length of the room = 12 m
Width of the room = 8 m
Height of the room = 4m
Area of the four walls of the room = ?
Solution :
Perimeter of the base x height of the room
=2(l+b)×height
= 2(12+8)×4
=2×20×4
=160m²
Cost of white washing per m²=rs.5
Total cost of white washing=160×5
=800rs
Area of ceiling is = 96m²
Cost of white washing of the ceiling =96×5
=480
Total cost of white washing=800×480
=1280rs
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