Question

Please answer the following question and give a full explanation.

Answer 1

ANSWER:

The perimeter of chocolate bar is 90cm.

$\rule{300}{2}$

EXPLANATION:

Here in this question, concept of perimeter of rectangle is used. We have given that a chocolate bar is made up 6 small rectangle pieces and dimensions of each small rectagular piece is given as 8.2cm×6.8cm.

To Find the perimeter of chocolate bar, first we have to obtain all sides of chocolate bar.

$\rule{300}{2}$

The length of chocolate bar is given as:

=> 3 × length of small rectagular piece.

=> 3 × 8.2cm

=> 24.6cm

$\rule{300}{2}$

The breadth of chocolate bar is given as:

=> 3× breadth of small rectagular piece.

=> 3× 6.8cm

=> 20.4cm

$\rule{300}{2}$

We have obtained the dimensions of the chocolate bar:

Length→ 24.6cm

Breadth→ 20.4cm

$\rule{300}{2}$

Perimeter of rectangle is given by:

→ 2(Length+Breadth)

→ 2(24.6cm+20.4cm)

→ 2(45cm)

→ 90cm.

So the required perimeter of chocolate bar is 90cm.

$\rule{300}{2}$

ADDITIONAL INFORMATION:

More important formulae:-

★ Area of rectangle=Length×breadth

★ Perimeter of square=4×Side

★ Area of square=Side²

★ Area of right angled triangle=½×Base×Height

$\rule{300}{2}$

Answer 2

Answer:

180cm

Step-by-step explanation:

length of each smaller rectangle = 8.2cm

Breadth of each smaller rectangle = 6.8cm

therefore, Perimeter = 2(l+b)

= 2(8.2+6.8)

= 2* 15.0

= 30cm

Hence , total number of small rectangle = 6

therefore , Total perimeter = 6*30

= 180cm..

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