Question 725883
width x
length = x+6

Area = x(x+6)

new width--------x+1
new length ------x+6+2

Area = (x+1)(x+8)

The difference between the areas is 56

(x+1)(x+8)-x(x+6) =56

x^2+9x+8-x^2-6x=56
3x+8=56
3x=48
x=16 

width = 16 cm
length = 22cm