Question

The perimeter of a rectangle is 40 m and its length is 15 m. Find its breadth. ​

Answer 1

Answer:

64m^2

Step-by-step explanation:

let breadth = x

length = 5x - 4

perimeter = 2(l+ b)

2 ( 5x - 4 + x ) = 40

2 ( 6x - 4 ) = 40

12x - 8 = 40

12x = 40 + 8

12 x = 48

x = 48 / 12

x = 4

breadth = 4 m

length = 5* 4 - 4

20 - 4

16m

area = l* b

16 * 4

64m^2

Answer 2

Answer:

Perimeter of rectangle = 2(l+b)

{ l=length , b=breadth }

40=2(15+b)

15+b=40/2

b=20-15

b=5

Breadth of the rectangle is 5m