Two car are moving in the same direction with a speed of 45 km/hr and a distance of 10 km separates them. If a car coming from the opposite direction meets these two cars at an interval of 6 minutes, its speed would be
- A. 45 km/hr
- B. 55 km/hr
- C. 65 km/hr
- D. 75 km/hr
Answer: B. 55 km/hr
Explanation: Relative speed of approach $V_{rel} = V + 45$. Distance = 10 km. Time = 6 min = 0.1 hr. $10 = (V+45) \times 0.1 \implies 100 = V + 45 \implies V = 55$.