Question

answer please




std 10 maths​

Answer 1

Answer:

$surface \: area = (2 \times 80 \times 40) + (2 \times 40 \times 20) + (2 \times 20 \times 80)$

$= (6400 + 1600 + 3200) = 11200 {cm}^{2}$

$1 \: paper = (40 \times 40) = {1600cm}^{2}$

$no. \: of \: papers = (11200 \div 1600) = 7$

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Answer 2

Answer:

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