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An open box is made of wood 3 cm thick.Its external dimensions are 1.46m,1.16m and 8.3dm.Find the cost of painting the inner surface of the box at75 paise

per 100cm


Length of box=1.46m
breadth of box=1.16m
height of box=8.3dm=0.83m
length of inner side of box=1.46-2(0.03)=1.4m
breadth of inner side of box=1.16-2(0.03)=1.1m
heigth of inner side of box=0.83-0.03=0.77m
Area of painted side after left top=2(lb+bh+hl)-lb

for 1m² cost of amount require=75 paise
5.39......................................=75x5.394=404.25 paise

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