Question

The lid of a rectangular box of sides 40 cm by 10 cm is sealed all round with tape. What is the length of the tape reauired?

Answer 1

Answer:

100 cm or 1 m

Step-by-step explanation:

the length of the tape will be equal to the perimeter of the lid.

perimeter of rectangle=2(l+b)

perimeter=2(40+10)

               = 2×50

               =100 cm

length of tape required=100 cm

                                      =1 m

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Answer 2

✦ Question :-

The lead of a rectangular box of side 40 cm by 20 metre is sealed all round with tape what is the length of the tape word?

Answer :-

$\red{\bigstar}$ Length [l]

$\huge\leadsto{\sf\purple{10 \: m}}$

Given :

Length of the rectangular box = 40 cm

Breadth of the rectangular box = 10 cm

Find :

Length = ?

Solution :-

According to the Question :-

Length of tape required = Perimeter of the rectangular box

So , Applying formula :-

Perimeter of rectangle = 2 ( l + b )

= 2 (40 + 10)

= 100 cm

Now , Converting it into cm

= 10 m is the required answer .

Additional Notes :-

❥ Perimeter of Rectangle = 2( L + B )

❥ Perimeter of square = 4 × Side

❥ Perimeter of triangle = AB + BC + CA

❥ Area of Rectangle = L × B

❥ Area of Square = ( side ) ²

❥ Area of Rhombus = Product of Diagonal/2.

❥ Area of Parallelogram = Base × Height.

❥ Area of triangle = 1/2 × base × height .