a cubical box with lid has a side of 30 cm. find the cost of painting of the inside and outside of the box at rs 200 m ka 2
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side =30 cm
30/100m=0.3m
total surface area of the inside box is = 6 l^2
6x0.3^2
0.09m^2
0.54m^2
total surface area of the outside box= 6 l^2
6x0.3^2
6x0.09
0.54m^2
Total=0.54+0.54=1.08
Rate=1.08x200=Rs216
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