With standard resistances 2.0Ω  and 1.0Ω  in the gaps of a metre bridge, the balancing length is 66.9 cm from the higher resistance A of the bridge wire. When the resistances are interchanged, the balancing length is 33.5 cm from the same end A. With an unknown resistance X and standard 1.0  in the gaps, the balancing length is 59.7 cm from the end A nearer to X. Then value of X is