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  1. A man completes 30 km of a journey at 6 km/h and the remaining 40 km of the journey in 5 h. Find the average speed for the whole journey.
    1. 64/11 km/h
    2. 7 km/h
    3. 71/2
    4. 8 km/h
Correct Option: B

Total distance = 30 + 40 = 70 km
Total time taken = (30/6) + 5 = 10 h
∴ Required average speed = 70/10 = 7 km/h


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