Question 743
let x be the time taken for 200 km apeart.
in x hrs car "A" will go x*35 km (distance =speed * time)
in x hrs car "B" will go x*55 km

togather both will go 35x+55x = 200
90x = 200
x=200/90 hts
x= 2 hrs and 2/9 hrs
 = 2 hrs and 2/9*60 mins
 = 2 hrs and 13 mins