Question

the perimeter of a rectangle is 90 m whose breadth is 10 m less than its length. we can write the equation as 2(x-10) = 90 is true or false ​

Answer 1

Step-by-step explanation:

Let length be x.

breadth is x-10

Perimeter of rectangle=2(l+b)

2(x+x-10)=90

2(2x-10)=90

4x+20=90

4x=90+20

4x=110

length=110/4=27.5

breadth=27.5-10=17.5.

Answer 2

Step-by-step explanation:

perimeter = 90

let length = x

breadth= x-10

perimeter of rectangle = 2 (l+b)

90 = 2 ( x + x-10)

90=2 (2x - 10)

90 = 4x - 20

90 + 20 = 4x

110/4 = x

27.5 = x

length = 27.5 m

breadth = x-10= 27.5 - 10= 17.5m