Roja and Pooja start moving in the opposite directions from a pole. They are moving at the speeds of 6 km/hr and 3 km/hr respectively. After 4 hours what will be the distance between them? Choose the most appropriate option: A) 22 km B) 20 km C) 65 km D) 18 km E) 36 km

Rationale: distance = relative speed * time = ( 6 + 3 ) * 4 = 36 km [ they are travelling in the opposite direction , relative speed = sum of the speeds ] . answer : e
Answer: E