Question

The length and the breadth of a rectangle are in the ratio of 13 : 7; if area of a rectangle is 2,275 cm?, find its perimeter.
plz solve this problem with full explanation Plz​

Answer 1

Answer:

1000 cm

Step-by-step explanation:

let the length = 13x

let the breadth = 7x

area = L * B = 13x * 7x

91x = 2275

x = 25

length = 325

breadth = 175

perimeter = 2(l+b) = 2* 500 = 1000cm

Answer 2

➡️ ANSWER

Given,

● Length and breadth of a rectangle in ratio 13:7

● Area of rectangle = 2,275cm².

To Find?

■ Perimeter

Solution:-

We know that

Area of rectangle = length × breadth

By using this formula,

Let, their length and breadth be 13x and 7x.

$2275 {cm}^{2} = 13x \times 7x$

$⟼ \: 2275 {cm}^{2} = 91 {x}^{2}$

$⟼ \: \frac{2275 {cm}^{2} }{91 } = {x}^{2}$

$⟼ \: 25 {cm}^{2} = {x}^{2}$

$⟼ \: \sqrt{25} = x$

$⟼ \: 5 = x$

Length = 13x = 13×5 = 65

Breadth = 7x = 7×5 = 35

We know that,

Perimeter of a rectangle = 2(l+b)

$2(65 + 35)$

$= 2(100)$

$= 200cm$