Question

a box which is measure 70 into 36 into 12 is to be covered with Canvas how many metre of Canvas of width 80 centimetre would be required to cover 150 such boxes​

Answer 1

$TSA \: \: of \: \: box = 70 \times 36 \times 12 \\ \\ = (840 \times 36) \\ = 3024 \: {cm}^{3} \\ \\ \\ total \: \: TSA \: \: of \: \: 150 \: such \: boxes = (3024 \times 150) = 453600 \: cm^{3}$

Now,

$Required \: \: \: Length \: \: \: of \: \: \: canvas = \frac{453600}{80} = 5670 \: cm \: \: \: or \: \: \: 56m \: 70cm$