Question

please help me out guyzzz in this questions..​

Answer 1

Answer 2

Answer:

Cardboard box is a cuboid , use formula of surface area

$= 2(lb + bh + hl) \\ \\ = 2(60 \times 70 + 50 \times 60 + 50 \times 70) \\ \\ = 2 \times 10700 \\ \\ = 21400 \: {cm}^{2}$

But since it is open from top we have to remove area of top rectangle ,so area

$= 21400 - 70 \times 60 \\ = 17200 \: {cm}^{2}$

And cost

$= 17200 \times 2 \: paise \\ = 344 \: rupees$