Question

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

Answer 1

Explanation:

Perimeter =2[l+b]

280=2*20+b

280=40+2b

280-40=2b

240=2b

120=b

Answer 2

Answer:

Let breadth of a rectangular floor= x

Let length of a rectangular floor = x+20

Given Perimeter = 280m

Perimeter= 2(l+b)

280 = 2(x+20+x)

280/2 = 2x+20

140 -20 =2x

120/2 =x

60 =x

Breadth = x=60m

Length = x+20

= 60+20

= 80m