Question

Mary wants to decorate her Christmas tree she wants to place that we on a wooden box covered with coloured paper with pictures of Santa Claus she must know the exact quantity of paper to buy for this purpose if the box has length 80 CM breadth 40 cm and height 20 CM respectively then how many square sheet of papers of side 40 cm would she required​

Answer 1

Answer:

Given that mary wants to paste the paper on the outer surface of the box. The quantity of the paper required would be equal to the surface area of the box which is of the shape of cuboid. The dimension of the box are

Length l=80 cm

Breath b=40 cm

Height h=20 cm

Surface area of the box =2[lb+bh+hl]

=2[80×40+40×20+20×80]

=2×5600

=11200 cm

2

Area of each sheet of paper =40×40

=1600 cm

2

∴ Number of sheets required =

1600

11200

=7