The length, breadth and height of a cuboidal room are 10m, 8m and 4m respectively. Find the total cost of whitewashing all four walls of the room if the cost of white washing per m³ is Rs.5.
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Step-by-step explanation:
l=10m,b=4m,h=4m
Area of wall =2(lh+bh)
=2(10×4+4×4)
=112
cost of whitewashing is=15×112=1680
Cost ⇒Rs.1680
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