Two straight tracks AOB and COD meet each other at rt angles at point O.A person walking at a speed 5 km/hr along AOB is at crossing O at 12 o clock noon, another person with speed 5 km/hr walking along COD reaches O at 1:30 pm .
F ind the time when the distance between the two persons is least?
Two straight tracks AOB and COD meet each other at rt angles at point O.A person walking at a speed 5 km/hr along AOB is at crossing O at 12 o clock noon, another person with speed 5 km/hr walking along COD reaches O at 1:30 pm .
F ind the time when the distance between the two persons is least?