Question

the length of rectangular plot is 20 m more than its breadth if the perimeter of the floor is to 80what is its length

Answer 1

Let the breadth be x and then Lenght will be x+20


Now,

Perimeter of rectangle =2(length +breadth)


80=2(x+x+20)

80/2 =2x+20

40=2x+20

40-20=2x

20/2 =x

10 m =x

Now,

Length =x+20=10+20 =30m

Breadth =x =10m



I hope this will help you


-by ABHAY

Answer 2

l =20+b
p=80
2(l+b)=80
2(20+b+b)=80
2(20+2b)=80
40+4b=80
4b=80-40
4b=40
b=40/4=10
l=20+10
l=30
hope this helps u!!