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A covers 1/4th of his journey at 20 km/h and 1/3rd of the rest at 25 km/h and half of the rest at 30 km/h and rest at the speed of 40 km/h and half of the rest at 30 km/h and rest at the speed of 40 km/h. What is the average speed of A?

1)1378/89 km/h

2)12 km/h

3)2686/89 km/h

4)28 km/h


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    2686/89 km/h

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  • Exam: Time Speed and distance QUESTIONS





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