Question

the lenght of a rectangular floor is 20m, more than its breadth.if the perimeter of the floor is 280m,what is its lenght​

Answer 1

Step-by-step explanation:

Let length be 20+x

Breadth be x

Perimeter.=l+b

280 = 20+x+x

280-20=2x

260=2x

X=260/2

X=130

I=130+20=150m

B=130m

Answer 2

Step-by-step explanation:

let length be 20+x

breadth be x

perimeter = ( l + b ) 2

280 = (20 + x + x )2

280 = ( 20 + 2x ) 2

280 ÷ 2 = ( 20 + 2x )

140 = 20 + 2x

140 – 20 = 2x

120 ÷ 2 = x

60 = x

now x = 60

length = 20 + 60 ( 20 + x )

= 80