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, the distance between his house and school is:
[A] 6.5 km
[B] 5.5 km
[C] 5 km
[D] 6 km

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This question is part of UPSC Prelims Practice and Mock Tests membership programme.