Question 603745
We have to find out how much time the Canary flies, before they collide

Car I speed = 100 km/h
Car II speed = 10km/h

they are moving towards each other
so add up their speeds= 110 km/h

distance =  645 km

Time = d/r
t= 645/110

t= 5.86 hours

speed of Canary = 120 km/h
time = 5.86 hours
so distance it flies = 5.86 *120= 703 km approx