Question

the length of a rectangular floor is 20m,more then it's breadth.if the perimeter of the floor is 280m, what is it's length
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Answer 1

Answer:

Let Breadth =x

       Length =x+20

Perimeter of a rectangle = 2(L+B)

                                          =2(x+20+x)

                                          =4x+40

Given perimeter =280

4x+40=280

4x=240

x=60

Therefore, breadth=60length=80                                      

Step-by-step explanation:

I hope it helps you

Answer 2

Answer:

140

Step-by-step explanation:

280=2x+40

280-40=2x

240=2x

240/2=x

120=x