A room is 10m long 6 m wide and 4.2m high.it has one door of 2.5m×1.5m and one window of dimension 1.5m ×1m.find the cost of white washing the walls Rs 2.50 per .sq
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area of door=2.5×1.5=3.75m
area of window=1.5×1=1.5m
area of four wall=2lh+2wh=2(l+w)h=8.4(16)
=134.4m
area of top=lw =10×6=60
(134.4+60)-5.25
=189.15sqm
189.15*2.5=472.875
area of window=1.5×1=1.5m
area of four wall=2lh+2wh=2(l+w)h=8.4(16)
=134.4m
area of top=lw =10×6=60
(134.4+60)-5.25
=189.15sqm
189.15*2.5=472.875
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