Answer:
lenght = 2x + 3
breadth = x - 1
perimeter = 40
Now,
perimeter = 2(l+b)
40= 2( 2x + 3 + x - 1)
40= 2(3x - 2)
40 = 6x- 4
40+4 =6x
44/6 =x
x = 7.33
