A man travels at a speed of 12km/h and returns at a speed of 9km/h. If the total time tzken by the man is 3 hours and 30 minutes, find the distance he travelled one way.
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Step-by-step explanation:
1) Speed of man=12km/h
2) Returning speed of man= 9 km/ h
3) Total time taken= 3hr 30min
4) Distance=Speed / Time
5)21km/h /3
= 7 km
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