Question

Shivansh has a gift placed in a cuboidal box of dimensions 80cm,40cm and 20cm. He wants to cover the box nicely to present it to his friend on his birthday. Instead of using coloured paper, he decided to use squared papers of old magazines of side 40cm each. How many square sheets of magazines are required

Answer 1

given :-

length of the cuboidal box = 80cm

breadth of the cuboidal box = 40cm

height of the cuboidal box = 20cm

now we have to find it's TSA since he want to wrap it.

TSA of the cuboidal box = 2(lh + bh + lh)

= 2(80 × 40 + 40 × 20 + 80 × 20)

= 2(3200 + 800 + 1600)

= 2(5600)

= 11200cm²

area of the sheet he decided to wrap with = side² (since the sheet is squared shape)

= 40²

= 40 × 40

= 1600cm²

therefore no. of sheets required to cover the cuboidal box = 11200/1600

= 7

hence, 7 sheets are required.

Answer 2

hey mate jere is ur answer

given that

length = l = 80 cm
breadth = b = 40 cm
height = h = 20 cm

to find

TSA of box = 2( lb + bh + hl)
= 2 ( 80×40 + 40×20 + 20×80)
= 2 ( 3200 + 800 + 1600 )
= 2 ( 5600 )
= 11200 cm ^2

area of a square sheet = side^2
= 40^2
= 1600 cm^2

no of sheets required
ar (cuboidal box) / ar (square sheet)
11200/1600
= 7 sheets

hence 7 sheets are required to cover the box

plzzzzzz mark as brainliest