Question

the perimeter of the rectangle is 76m if the length is of 20m find breath and area of it (with method) ​

Answer 1

Answer:

breadth=18m

area=360m.sqr.

Step by step explanation:-

Finding Breadth of given rectangle.

$perimeter = 76m \\ lenght = 20m \\ perimeter \: of \: rectangle = 2(l + b) \\ 2(l + b) = 2(20 + b) = 76 \\ 40 + 2b = 76 \\ 2b = 76 - 40 \\ b = \frac{36}{2} \\ b = 18m$

Hence,breadth of rectangle=18m

Now,Finding area of given rectangle

$area \: of \: rectangle = l \times b$

$= 20 \times 18 \\ = 360 {m}^{2}$

Hence, area of rectangle = 360m.sqr.

Hope it helps you..

Answer 2

Answer:

$perimeter = 76 \\ length = \: 20 \\ breath = \: x \\ breath = 2 \times (20 + x) = 76 \\ breath = 20 + \times = \: \frac{76}{2} = 38 \\ breath = x \: = 38 - 20 \: = \: 18 \\ breath = 18 \\ \\ area = length \: \times breath \\ area = 20 \times 18 \\ area \: = 360$