Question

how much sheet is required to make a closed rectangular box of length 1.5metre,breadth1.2metre and height 1metre​

Answer 1

Sheet required = TSA of rectangular box.

TSA =

$2(lb + bh + hl)$

$= 2(1.5 \times 1.2 + 1.2 \times 1 + 1 \times 1.5)$

$= 2(1.8 + 1.2 + 1.5)$

$= 2 (4.5)$

$= 9 \: {cm}^{2}$

Therefore the area of sheet required is 9 cm².

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