A boy goes to school with the speed of 6 km/h. and returns with a speed of 4 km/h. If he takes 10 hours in all. The distance in kilometers between the village and the school is:
Explanation:
Let distance be d km.
Then, average speed = 2×6×46+4=2d10
∴ d = 24 km
Hence, option (a).
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