Question

solve it properly with method​

Answer 1

Answer:

this is you answer hope it is helpful for you

Perimeter=40

let breadth be x

length be 5x-4

a/q

2(5x-4+x)=40

or,12x-8=40

or,x=48÷12

so,x=4

Breadth=4

length=16

Answer 2

Answer:

Step-by-step explanation:

let length =x

breadth =y

 perimeter=2(length +breadth)

∴2(x+y )=40

⇒x+y=20..............(I)

2nd information

x=5y-4

x-5y=-4..............(ii)

from (i)and(ii), we get

6y=24

y=4

x=16

∴ length is 16cm