a cubical box with a led has a length of 30 cm. find the cost of painting the inside and outside of the box at?₹5.50 per m²
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total surface area formula is
so
a=30
than 6a×a
tsa=5400m×5400×5.50
so
a=30
than 6a×a
tsa=5400m×5400×5.50
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