Question

4 A music cassette is 9 cm long and 6 cm wide. Find its perimeter.​

Answer 1

Answer:

30 cm

Step-by-step explanation:

Perimeter of rectangular music cassette = 2(9+6)

= 2*15. = 30 cm

Answer 2

• The perimeter of the music cassette = 30 cm.

Given :

• The length of a music cassette = 9 cm.
• The width of a music cassette = 6 cm.

To Find :

• The perimeter of the music cassette.

Solution :

We know that,

A music cassette is a rectangle.

So, we can use the formula of the perimeter of a recrangle.

Formula :-

$\underline{ \boxed{ \bf{\blue{perimeter \: of \: the \: rectangle = 2(l + b)}}}}$

Where,

• l = length.
• b = breadth.

We have,

• l = 9 cm.
• b = 6 cm.

$\bf \implies 2(9 \: cm + 6 \: cm) \\ \\ \\ \bf \implies 2(15 \: cm) \\ \\ \\ \bf \implies 2 \times 15 \: cm \\ \\ \\ \bf \implies 30 \: cm \\ \\ \\ \: \: \therefore \: \: \bf perimeter = 30 \: cm$

Hence,

The perimeter of the music cassette is 30 cm.