Question

The perimeter of a rectangle is 30 metres. If it's length exceeds it's breadth by 3 metre, then find its length​

Answer 1

Answer:

let, the breadth be X and length be X + 3

perimeter = 2( l + b)

30 m = 2 ( x + 3 + x)

15 m = 2x + 3

2x = 12 m

x = 12 / 2 = 6m

breadth = 6m

length = x + 3 = 9 m

Answer 2

Answer:

p=2(l+b)

let breadth be 'x'

length = x+3

30=2(x+3+x)

=2(2x+3)

30=4x+6

30-6=4x

24=4x

x=6m

breadth is 6m

length is 9m