there is a circular track of 4200m.sahana,parween and gopi starts racing at 10.00 am at the speed of 5m/s,10m/s,8m/s.
sahan and parween are standing diametrically opposite and gopi is somewhere in between.
gopi and parween is starts running clockwise and sahana starts running in anticlockwise direction.after first meeting of sahana parween distance travelled by gopi .sahana and parween meets after 10:05 am.