A boy went to his school at a speed of 12 km/hr and returned to his
house at a speed of 8 km/hr. If he has taken 50 minutes for the whole
journey, what was the total distance walked?
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Step-by-step explanation:
Total time = 50 min = 5/6 h
D/12 + D/8 = 5/6
5D/24 = 5/6
D = 4 km
Total distance = 2D = 2×4 = 8 km
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