Potential difference XY is_______________________________________V

The practical distance of 48 between 2 points which is given in the question...... ...... .... And the net resistance between those 2 points=6 ohm as 1/24+1/8 =4/24 =1/6= 1/R..........And hence current flowing = V/R = 48/6 = 8 ohm ................. Therefore a court of 8 amp is flowing through the circuit.......... Now the net resistance between x and y is 20 ohm by calculating .. ...... ...... Now V=IRAnd therefore V=20×8 =160 volts....