TIME & DITANCE ( SUPER TRICKS)

Q. A boy goes to his school from his house at a speed of 3 km/ hr and returns at a speed of 2 km/hr. If he takes 5 hours in going and coming, Then the Distance between his house and the school ?

1) 6 km 2) 5 km 3) 5.5 km 4) 6.5 km 5) None of these