Question

if the box has length breadth and height as 80cm 40cm and 20cm respectively how many square sheets of side 40cm would she require

Answer 1

Answer:

Step-by-step explanation

Given - l = 80, b = 40, h = 20

First we have to find the area of box

Area of cuboid = 2(l x b + b x h + h x l)

2(80 x 40 + 40 x 20 + 20 x 80)

2(3200 + 800 + 1600)

2 x 5600

11200 Sq. cm

Therefore area of cuboid is 11200 Sq. cm

Now we will find area of square sheet

Given - side = 40cm

Area of square = side x side

= 40 x 40

= 1600 Sq. cm

Therefore area of square sheet is 1600 Sq. cm

No. Of sheets will fit

= area of box/ area of square sheets

= 11200 / 1600

= 7

Therefore 7 sheets will be required.

Answer 2

30 is the correct answer