A boy goes to his school from his house at a speed of 3km/hr and return at a speed of 2km/hr. If he takes 5 hours in going and coming, the distance between his house and school is?	Choose the most appropriate option: A) 5 km B) 6 km C) 10 km D) 12 km E) 8 km

Rationale: average speed = 2 * 3 * 2 / 3 + 2 = 12 / 5 km / hr distance traveled = 12 / 5 * 5 = 12 km distance between house and school = 12 / 2 = 6 km answer is b
Answer: B