Question

Length‚breath and height of a rectangular box is 80 cm 40 cm 20 cm. if a square paper of 40 cm is glued on it. how many such papers will be required​

Answer 1

Answer:

these is your answer ok !

Answer 2

7 square papers will be needed

Step-by-step explanation:

Given:

length of rectangular box(l)= 80cm

breadth of rectangular box(b)=40cm

height of rectangular box(h)= 20cm

side of square paper=40cm

To find:

square papers required

Solution:

The rectangular box described is in the shape of a cuboid

So we find the area of the cuboid using the dimensions

Area of cuboid = 2(lb+bh+lh)

Area of cuboid = 2[80x40+40x20+80x20]

Area of cuboid = 2[3200+800+1600]

Area of cuboid = 2[5600]

Area of cuboid or the rectangular box = 11200 sq cm

Let's find the area of the square paper with the side of 40cm

Area of square= (side)²

Area of square= (40)²

Area of square= 1600 sq cm

Now to find the number of square papers required, we divide the area of the rectangular box by the area of the square paper

∴ number of square papers=     Area of box          

                                               Area of square paper  

∴ number of square papers = $\frac{11200}{1600}$

∴ number of square papers = 7

Thus 7 such square papers will be required.