A cubical box with lid has a length of 30cm. find the cost of painting the inside and outside of the box at rupees 5.50per m
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Side of cubical box=30 cm=0.3m
Area to be painted=2x6(side)^2
=2x6x0.3x0.3
=1.08sq.m.
Cost of painting inside and outside of cubical box=1.08x5.50=₹ 5.94
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