Car A trails car B by 50 meters. Car B travels at 45km/hr. Car C travels from the opposite direction at 54km/hr. Car C is at a distance of 220 meters from Car B. If car A decides to overtake Car B before cars B and C cross each other, what is the minimum speed at which car A must travel?
A. 36 km/hr
B. 45 km/hr
C. 67.5 km/hr
D. 18 km/hr
Ans: C. 67.5 km/hr
