solve the plz quck answer plz plz ans
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surface area of the tin box = total surface area of the box - l * b [ as it is open at top ]
= 2lb + 2bh +2lh - lb
= lb + 2bh + 2lh
= 20 * 16 + 2 * 16 * 14 + 2 * 20 * 14
= 32 + 448 + 560
= 1040
to make 10 such box 10400 cm2 will be required
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