find the cost of white washing 10 pillars around the building .the radius of a pillar 2mt and 7 my hig- the cost of white washing per m2 is rs.4.75
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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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