In an isosceles triangle, the difference between one of the equal sides and the unequal side (longest of the three) is \[\frac{\mathbf{1}}{\mathbf{9}}\mathbf{th}\] of the sum of the equal side and unequal side. If it is given that the perimeter of the triangle f 112 cm, then what will be the length (in cm) of unequal side?

• A. 50
• B.  55
• C.  40
• D.  45
• E.  None of these