Question

Mary wants to decorate her Christmas tree. She wants to place the tree on a wooden box
covered with coloured paper with picture of Santa Claus on it. She must know the exact quantity of
paper to buy for this purpose. If the box has length, breadth and height as 60 cm,40 cm and 25 cm
respectively how many square sheets of paper of side 40 cm would she require?​

Answer 1

Answer:

245

Step-by-step explanation:

Given that,

Length = 60 cm

Breadth =40 cm

Height = 25 cm

First of all, we have to find out the area of cuboidal box.

Now, the area of cuboidal box = 2(lb + bh + hl)

Area of cuboidal box = 2[(60)(40) + (40)(25) + (25)(60)]

Area of cuboidal box = 2(2,400 + 1,000 + 1,500)

Area of cuboidal box = 2(4,900)

$\boxed{\pink{\mathsf{area\:of\:cuboidal\:box = 9,800\:cm^2}}}$

Now, we will find the area of sheet required.

Square sheets required = area of box ÷ square sheets of 40 cm

Square sheets required = $\frac{9,800}{40}$

$\boxed{\purple{\mathsf{Square\: sheets\:required = 245}}}$

Therefore, 245 sheets are required.

Answer 2

$\bf{\underline{\underline{Answer:}}}$

• 245 square sheets required

$\bold{\underline {Given:}}$

Dimensions,

• Length = 60 cm

• Breadth =40 cm

• Height = 25 cm

Sides of the square sheets = 40 cm

$\bold{\underline {To\:find :}}$

• Number of required square sheets =?

$\bf{\underline{\underline{Step\: by\: step \:explanation:}}}$

Area of cuboidal box,

Now, the area of cuboidal box = 2(lb + bh + hl)

Area of cuboidal box = 2[(60)(40) + (40)(25) + (25)(60)]

Area of cuboidal box = 2(2,400 + 1,000 + 1,500)

Area of cuboidal box = 2(4,900)

$\bf {Area\:of\:cuboidal\:box = 9,800\:cm^2}$

Now, we will find the area of sheet required.

Square sheets required = area of box ÷ square sheets of 40 cm

Square sheets required = $\dfrac{9,800}{40}$

$\bf{{Square\: sheets\:required = 245}}$

Thus, 245 sheets are required.