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A man completed a certain journey by a car. If he covered 30% of the distance at the speed of 20kmil hr, 60% of the distance at 40km/hr and the re. maining distance at 10km/hr; his average speed for the whole journey was

1)25 km/hr

2)28 km/hr

3)30 km/hr

4)33 km/hr

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    25 km/hr

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  • Exam: Time Speed and distance QUESTIONS

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